Sophie Germain Prime Search found World Record twin primes [pdf]

[chx]

It's incredibly fascinating how very simple constructs like primes have such complexity to them. It's very easy for a 14 year old to formulate questions relating to primes that noone can answer.

[labster]

Noone is a pretty smart guy. But there are questions that no one, not even he, can answer.

[jason_slack]

what I find interesting is the amount of computing power that it takes to calculate.

Edit: As an after thought, there are recordings of million digit prime numbers: http://www.primegrid.com/download/SR5-180062.pdf

[pavel_lishin]

Are there chains of Sophie Germain primes?

e.g.,

    p is prime
    2p + 1 is prime
    2(2p + 1) + 1 is prime...

[teraflop]

Wikipedia says these are called Cunningham chains: https://en.wikipedia.org/wiki/Cunningham_chain

There are no infinite chains, but there are conjectured to be inifinitely many finite chains of every possible length.

[di]

https://en.wikipedia.org/wiki/Sophie_Germain_prime

[gr3yh47]

this is a great example of the title change rule making a title worse

i think taglines/subtitles/subject sentences should be eligible for titles too