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   Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 11-Jan-2024 17:57:46 JST Ryan Castellucci (they/them) :nonbinary_flag:

   I somehow never realized until now that the reason a 521 bit prime is used instead of a 512 bit prime for NIST elliptic curves is that 2521\ -1 is a Mersenne prime.

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     Aris Adamantiadis :verified:💲Paid (aris@infosec.exchange)'s status on Thursday, 11-Jan-2024 18:08:06 JST Aris Adamantiadis :verified:💲Paid

     in reply to

     @ryanc The NIST specs indicate at many places that 521 is not a typo because it looks so weird when we're used to powers of two