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Re:A Curious Sequence of Prime Numbers by ummonk on Sunday May 26, 2019 @07:11PM (#20018162)
Wait, you expect to be able to easily check primality of 2^32 + 1 by hand? Like with a naive algorithm you’d need to use erastothenes sieve to find primes up to 2^16 to test against. Granted, 641 itself is rather small but if you didn’t expect to encounter a factor that early...
Re:A Curious Sequence of Prime Numbers by saagarjha on Sunday May 26, 2019 @07:20PM (#20018225)
> Like with a naive algorithm you’d need to use erastothenes sieve to find primes up to 2^16 to test against.

π(2^16)=6542: if you told me in elementary school that I might disproving something famous I can see myself working on that for a couple of hours daily for a week or so.

Re:A Curious Sequence of Prime Numbers by ummonk on Sunday May 26, 2019 @07:51PM (#20018395)
What if I told you you'd very probably just show that the pattern continues to hold for the first 5 n?
Re:A Curious Sequence of Prime Numbers by saagarjha on Sunday May 26, 2019 @09:16PM (#20018737)
You’d stifle mathematical innovation: after all, there are quite a few things that have been proved or discovered by people who were fortunate enough to not be told that they were solving a hard problem.