Channel
@kaf42
On this record: Growth · Engagement · Reactions · Posts · Citations · Cite this entry
1,883subscribers
-1 since we began measuring on 6 August 2026
Risers and fallers across the register · movement among entries of 1,000–3,162.
| Telegram ID | -1001196313392 |
|---|---|
| Type | Channel |
| Username | @kaf42 |
| Created | 12 October 2019 — measured — cross-checked against a third-party dataset (ext.tg_channel) |
| First recorded | 6 August 2026 |
| Last confirmed live | 11 August 2026 |
| Measurements held | 4 |
| Confirmed unchanged | 1 time, most recently 11 August 2026 |
| On Telegram | t.me/kaf42 |
| Measured (UTC) | Subscribers | Change |
|---|---|---|
| 11 Aug 2026, 23:34 | 1,883 | +4 |
| 9 Aug 2026, 09:13 | 1,879 | -5 |
| 6 Aug 2026, 09:40 | 1,884 | no change |
| 6 Aug 2026, 08:36 | 1,884 | first reading |
16 posts held, back to 22 March 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 2 pagesof Telegram’s post history, 20 posts per page.
ERR is average views per post over the last 30 days divided by subscribers, the definition TGStat uses, so this figure is comparable with the one you will see elsewhere. It falls structurally as a channel grows: a high ERR on a small channel and a low one on a large channel describe reach mathematics, not quality. We publish the figure and the sample it came from and pass no verdict on it.
ER is defined industry-wide as (forwards + reactions + comments) ÷ views— note the denominator is views, not subscribers. Telegram’s public web preview carries views and reactions but not forward or comment counts, so the reaction rate above is the reactions term only and is therefore a floor: the true ER for this channel is higher by an amount we have not measured and will not estimate.
| Window | Rolling 30 days · latest post in window 7 August 2026 |
|---|---|
| Posts held | 16 (22 March 2026 – 7 August 2026) |
| Views total | 539 |
| Reactions total | 30 |
| Forwards / comments | not exposed by the public surface — not measured, not estimated |
| Readings taken | 7 Aug 2026, 17:22 UTC |
Views are a single reading per post, taken at the time above. A post published in the last day or two is still accumulating views, which pulls the 30-day average down slightly. That is a property of the standard definition rather than a fault in it, so we keep the definition rather than “correcting” the number into something nobody can reproduce.
Precision. Telegram publishes view counts on its public widget in short form — 8.12K, 3.7M — so any reading at or above 1,000 reaches us rounded to three significant figures, and only counts below 1,000 are exact. Averages and rates derived from them are shown to the same precision rather than to the unit: a figure like 3,701,250 would assert digits nobody measured.
Reaction counts are published per emoji and rounded the same way, so a total below 1,000 is exact and a larger one is a sum that may carry a rounded component from each emoji above 1,000. Because it is a sum, it does not look rounded — read a large reaction total as three significant figures per contributing emoji rather than as the figure it prints.
626 reactions across 15 posts, in 4 distinct kinds. The most used accounts for 53.5% of them.
| Reaction | Count | Share | Share, drawn |
|---|---|---|---|
| custom 5408877264764958261 | 335 | 53.5% | |
| custom 5406927310957868757 | 145 | 23.2% | |
| custom 5408876289807381500 | 102 | 16.3% | |
| custom 5406642941173202993 | 44 | 7.03% |
Custom emoji. Every row above is a Telegram custom emoji, which the public preview renders as an element carrying only a numeric id — no character, and no image we can reach. The id is printed as-is rather than substituted with a look-alike glyph, because a stand-in would be our invention showing where a measurement should be. The counts beside them areTelegram’s.
No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.
Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.
Coverage. Reactions were read on 16 of the 16 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 670reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.
Measured over the 16 most recent posts we hold, published 22 March 2026 to 7 August 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.
Вот и настал тот день, когда Rop Runners сделали свою платформу для A/D (на что ушло без малого 4 месяца) ➡️Встречаемся 24.08 на RCTF 2026, не забудьте пройти регистрацию и зайти в чат с анонсами Давеча помогли провести финал @axiomctf, продолжая начатое, проведем в сентябре CTF-отбор на стипендии Яндекса и Лаборатории Касперского Stay tuned🤩
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Ничего нового, придется помучаться Объявляется очная A/D CTF тренировка для наших абитуриентов 🚨15 июля, 11:00-18:00 Регистрация до 13 июля Что ожидать от сервисов, не знают даже организаторы🐟 Обещаем несколько смешных фокусов
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От идеи до схемы В далеком 2023 году мы рисовали неинтуитивную схему связи IT-дисциплин на нашем бакалавриате ツ Пришло время рассказать подробнее про новую концепцию бакалавриата с двумя треками ⏩️Начинаем визуализацию с общего для двух треков набора обязательных дисциплин 5-8 семестров #дисциплины42
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👁 Осторожно, надвигается OFFZONE) Подписчики сообщают, что они успевают подать доклад до 29 июня Что одобряют: • личный опыт • фундаментальные исследования • уникальность • юмор и мемы Чтобы повысить свои шансы на попадание в программу, в обязательном порядке зачитываем статью на Хабре
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Как мы ходили на Assume Birch➡️ В дождливый вечер 169-го дня года замечательные организаторы собрали ИБ-сообщество на атмосферный митап с большим количеством яств и докладов: реверс прошивки, безопасность зарядных станций и много реальных кейсов А проходки от нас получили следующие известные деятели – Алексей Губер, Даниил Рудаков и Максим Токаев
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Жизнь налаживается, растем как бамбук🎋 Есть такая категория людей: они ставят задачи — мы их решаем. Вы собрали и прокачали команду, реализовали крутые проекты, наметили супер амбициозные планы Но есть одна задача, которая не дает спать спокойно: Ваша докторская. Защищайте её скорее❤️ С днем рождения, дорогой Константин Григорьевич! Ваша вечно молодая, преданная и иногда левентиковая @kaf42
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( ͡° ͜ʖ ͡°) Кто-то вспомнит, как мы раздавали проходки Сегодня на очереди очень атмосферный и немного андеграундный митап от наших друзей Assume Birch >_ 18 июня, 18:30, Москва Доступ на митапы @assume_birch по приглашениям, три из которых мы и хотим разыграть ➡️Правила просты: до ➊➌:➌➐ 1 июня постучаться в личные сообщения канала с самым оригинальным (одним) названием вашего учебного чата
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Возвращаемся раз в год, чтобы спросить: какие планы на этичный хакинг? Мы тут посмотрели в календарь и поняли – Pentest award 2026 уже открыла прием заявок Та самая премия от Awillix, где за интересные кейсы вы можете получить признание от комьюнити, респект и уважение, а также яблочные подарки ⚪️Регистрируйтесь на сайте, участвуйте и пусть победит Михаил Сухов #выпускники42
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Помните видео CTF кружка? Это они сейчас: ⫷ Reverse engineering: введение ๑ Реляционные базы данных и работа с инъекциями: SQL и SQLi ‽ Решение задач Bandit (Level 0 - Level 20) ‽ Решение задач Bandit (Level 26 - Level 33) ツ Решение тасков OSINT на платформе TryHackMe 𝜑 Криптография: подстановочные шифры и теория чисел 𝜑 Перестановочные и современные симметричные шифры 𝜑 Решение задач на платформе Cryptohack За…
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А у нас эпичные новости Поздравляем Макарова Артёма Олеговича с успешной защитой диссертации! Научный руководитель: к.ф.-м.н., доцент Варфоломеев Александр Алексеевич 👏В диссертационной работе разработаны новые постквантовые схемы последовательной агрегированной подписи — SAS‑UOV, LSAS‑UOV, а также APCFS/ARCFS и LARCFS на основе теории кодирования. Предложенные решения сокращают размер хранимых и передаваемых данн…
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Перезагрузка физики для кибербезопасников С 2026/27 учебного года курс общей физики заменит дисциплина «Физические основы компьютерных технологий» ⚫️Что меняется? ➀ Курс строится вокруг компьютерных технологий (хранение, передача, обработка информации) ➁ Лабораторные работы становятся центральными ➂ Новая структура (4 семестра ⇾ 3 семестра) и команда преподавателей А что в других вузах? Здесь мы проанализировали 1…
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Всем привет, играем в CTF, какие подводные? Представительный состав команды кафедры участвует в третьем сезоне Learning Bear @mephictf • Акимов Денис, Б23-516 • Рудаков Даниил, Б23-516 • Потапов Семён, Б24-515 • Аферьев Сергей, Б24-515 • Белозеров Максим, Б24-515 • Гречишников Михаил, Б23-515 • Фадин Егор, Б23-515 Программа проходит с 13 по 19 апреля в Диджитал Центре МИФИ - Росатом в Сириусе #студенты42
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Showing the 12 most recent of 16 posts we hold for @kaf42. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.
Citation-graph rank — 630,400 of 1,160,990entries in the measured graph. A weighted position computed from the forward and mention edges below — republished posts weigh more than named mentions — and recomputed periodically, over the whole graph. Published only as this ordinal position, never as a score: a position is a fact, and a score printed beside one channel’s name would read as a verdict this register does not make. The two counts beneath stay separate for the same reason mentions are never summed with forwards anywhere else on this page — a named-by count costs nothing to manufacture. The top 100 by this measure, or how it is computed.
Republished by
Channels on the register that have forwarded this channel's posts into their own feed.
Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.
Named by 1 registered channel — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.
Named by
Channels on the register whose posts name this channel's handle.
Names
Channels on the register whose handles appear in this channel's posts.
A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.
A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 11 August 2026 — this entry's latest reading, not the date you are reading this.
“kaf42” (@kaf42), 1,883 subscribers as measured 11 August 2026. Telegram Register, tgregister.com/channel/kaf42.
Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.