(no subject)

[fivemack]

echo "3o 185203545384014444998415700339182963094565346115682981302539679248192554448695865898272140289 14324129286424100231861565705311821806023066083407911748417199121054089089998098987789407767132602369 100512627347897906177 12079910333441 22320686081 134382593 *****p" | dc

A month of sieving on two dozen distributed computers and a 450-hour sequential calculation here.

Comments

[mobbsy.livejournal.com]

That sounds like the factors of a very prolonged soundcheck

[tau-iota-mu-c.livejournal.com]

I've heard one of those soundchecks. Yegads!

[stephdairy.livejournal.com]

What does it do/mean?

(S)

[fivemack.livejournal.com]

It's a list of the prime factors of 3^512+1; 3^512+1 is of some slight interest because, unlike 3^a+1 where a is not a power of two, it doesn't have a trivial factor, it's also the largest number whose factorisation I have organised.

I will be unusually happy if anyone manages to find a use for these factors, but I'd have thought that anything requiring a mere two months of calculation that people are actually interested in would by now have been calculated.

[simont]

Well, it's a list of the odd prime factors of 3^512+1; the 2 is omitted, which is why your piece of dc yields a lot of 1s followed by a 2 instead of a 1 followed by a lot of 0s and a 1.