HN Hall of Fame Weekly email

Illegal prime

en.wikipedia.org Reference Encyclopedia entries Society & policy Class of 2018-04 Hall of Fame
Screenshot of en.wikipedia.org captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 9 calendar years, with breakout response in 4 of them.

submissions
16
submitters
16
observed span
2010–2021
peak thread · 192 comments
267 pts
latest 20+ return · 2021-04-12
218 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

4856507896573978293098418946942861377074420873513579240196520736686985134010472374469687974399261175109737777010274475280490588313840375497099879096539552270117121570259746669932402268345966196060348517424977358468518855674570257125474999648219418465571008411908625971694797079915200486670997592359606132072597379799361886063169144735883002453369727818139147979555133999493948828998469178361001825978901031601961835034344895687053845208538045842415654824889333804747587112833959896852232544608408971119771276941207958624…

calibas·267-point thread·

There are several past threads of this article but this comment about how the DeCSS illegal prime was created seemed the most interesting: https://news.ycombinator.com/item?id=1045394 This might be thought of as a human version of a covert channel: https://en.wikipedia.org/wiki/Covert_channel E.g. publicizing the number and expiration date of Bill Gates' credit-card is illegal but what if we wrote a text commentary about Shakespeare's Hamlet that when SHA-1 hashed, it gives you that same information? Yes, it would…

jasode·218-point thread·

[ Ignoring the morality of making ideas illegal... ] This demonstrates the difference between data (i.e. the number itself) and information (the interpretation of data and use cases derived from that interpretation). What is "illegal" here is certain kinds of encryption and security software. A prime number is not the same thing as encryption and security software. But you can specify processes which allow encryption and security software to be uniquely identified by a prime number. The interpretation combined with…

Y'all totally missed what's going on here. Primepages (http://primes.utm.edu/) lists the largest known primes of various forms. One of the categories is primes that have no special form, which are the hardest to prove prime. Chris Caldwell, the primepages maintainer, called up Phil Carmody and said, "Phil, if you can turn DeCSS into a 'general prime' that's big enough for the top 20 ever discovered, I'll be happy to host it on primepages." (Just as he would host any prime…

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
4

100+ points or 50+ comments

Total points
949

reference only — not used in Hall rules or ranking

Total comments
490

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2010-01-11Illegal primeFirst breakoutniyazpk15276
2013-10-17Illegal Prime Numbersepenn17858
2013-10-29Illegal Primesanketsaurav10
2014-07-30Illegal prime numberthisjepisje5930
2014-10-24Illegal primegetdavidhiggins50
2014-11-30Illegal PrimesRamp_90
2014-12-22Illegal Prime Numbersxyby20
2015-07-30Illegal primeramanan90
2015-12-11Illegal primesspdionis20
2016-04-08Illegal Primevdfs10
2016-11-22Illegal primeavinassh3926
2018-04-27Illegal primeHall induction · Best threaddeadghost267192
2019-09-10Illegal Primespersonjerry31
2020-10-23Illegal Primehawkoy20
2020-11-20Illegal primeinput_sh20
2021-04-12Illegal Prime NumbersLatest 20+ point returnneatze218107