Primes in ϕ (phi) - Page 3

rogue · 2017-06-21, 14:02

I wasn't aware of that sequence. You know what to do if you want to search it.

Batalov · 2017-06-21, 15:10

Yup. Pixsieve (recompiled for linux even though there was no makefile) and modern enough pfgw (tat supports DECIMAL header).

Overnight, floor((sqrt(5)-1)/2*10^130911) (130911 decimal digits) was found.

rogue · 2017-06-21, 16:23

Maybe you could extend A057563 as well.

Batalov · 2017-06-21, 17:38

Quote:

Originally Posted by rogue

Maybe you could extend A057563 as well.

... 6152, ...

rogue · 2017-07-06, 18:30

Quote:

Originally Posted by Batalov

... 6152, ...

That was fast. Are you extending your search?

Batalov · 2017-07-06, 20:40

Yeah, I ran until 300000 or so - no other primes.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mersenne Primes p which are in a set of twin primes is finite?	carpetpool	Miscellaneous Math	3	2017-08-10 13:47
Distribution of Mersenne primes before and after couples of primes found	emily	Math	34	2017-07-16 18:44
Conjecture about Mersenne primes and non-primes v2	Mickey1	Miscellaneous Math	1	2013-05-30 12:32
A conjecture about Mersenne primes and non-primes	Unregistered	Information & Answers	0	2011-01-31 15:41
possible primes (real primes & poss.prime products)	troels munkner	Miscellaneous Math	4	2006-06-02 08:35

2017-06-21, 14:02	#23
rogue "Mark" Apr 2003 Between here and the 14313₈ Posts	I wasn't aware of that sequence. You know what to do if you want to search it.

2017-06-21, 15:10	#24
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3⁶×13 Posts	Yup. Pixsieve (recompiled for linux even though there was no makefile) and modern enough pfgw (tat supports DECIMAL header). Overnight, floor((sqrt(5)-1)/2*10^130911) (130911 decimal digits) was found.

2017-06-21, 16:23	#25
rogue "Mark" Apr 2003 Between here and the 18CB₁₆ Posts	Maybe you could extend A057563 as well.

2017-07-06, 20:40	#28
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3⁶×13 Posts	Yeah, I ran until 300000 or so - no other primes.