Post small primes and tell us about your progress here - Page 37

diep · 2015-12-24, 01:04

k=733 , searched to n=4 million. Busy searching up to 5M. No new primes so far.

Hopefully more luck next year (or in the few days remaining of this year).

firejuggler · 2016-01-01, 23:03

fermat,
20160101*2^n+1....
prime found so far :
20160101*2^5867+1
20160101*2^19977+1
20160101*2^21207+1
20160101*2^24393+1
20160101*2^27869+1
20160101*2^93615+1
20160101*2^98883+1
20160101*2^137747+1
20160101*2^169797+1
20160101*2^194597+1

diep · 2016-02-15, 11:25

Quote:

Originally Posted by diep

k=733 , searched to n=4 million. Busy searching up to 5M. No new primes so far.

Hopefully more luck next year (or in the few days remaining of this year).

Doh i must look in my logs whether i didn't do 3M-4M twice.

vasyannyasha · 2017-05-16, 16:05

k=6371 from n=10000 to 100000
Found 1 prime:
6371*2^62318-1 is prime! (18764 decimal digits)

VBCurtis · 2017-06-20, 03:37

I filled some gaps recently on old old work, and found:
2115*2^607390-1 is prime.

I'll report completion status on the k>300 (choose your own k) thread.

Dylan14 · 2017-08-29, 00:55

I have searched k = 17849 to a maximum n value of 1 M (starting from n =1), and the following primes were found:

17849*2^5448-1 (already found by Gallot)
17849*2^29840-1
17849*2^278912-1

Residue file is attached:

Dylan14 · 2017-09-23, 20:16

I have searched k = 17851 to n = 500k (starting from n =1), and the following primes were found:

17851*2^5-1
17851*2^17-1
17851*2^61-1
17851*2^121-1
17851*2^529-1
17851*2^907-1
17851*2^1141-1
17851*2^1669-1
17851*2^5053-1
17851*2^5081-1
17851*2^12247-1
17851*2^40399-1
17851*2^42641-1
17851*2^45679-1
17851*2^72445-1
17851*2^103273-1
17851*2^169961-1
17851*2^280111-1
17851*2^320413-1

Residue file is attached:

storm5510 · 2020-02-02, 14:19

1901*2^195870-1 is prime! (58967 decimal digits).
1901*2^239030-1 is prime! (71959 decimal digits)
1901*2^335018-1 is prime! (100854 decimal digits)

Passed 350,000.
Heading somewhere above 1,200,000 most likely.
Residue file attached.

storm5510 · 2020-02-05, 00:41

k = 1901, n = 700K complete. Continuing...
srsieve / sr1sieve / llr
No new primes found. Residues attached.

storm5510 · 2020-02-06, 16:45

k = 1901, n = 800K complete. Continuing...
srsieve / sr1sieve / llr
No new primes found. Residues attached.

storm5510 · 2020-02-08, 02:42

If I read it right, the smallest value in the top 5000 list has 429,390 digits. Why separate ones larger here?

2017-06-20, 03:37	#401
VBCurtis "Curtis" Feb 2005 Riverside, CA 2·23·103 Posts	I filled some gaps recently on old old work, and found: 21152^607390-1 is prime. I'll report completion status on the k>300 (choose your own k) thread. Last fiddled with by VBCurtis on 2017-06-20 at 03:37*

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2015-12-24, 01:04	#397
diep Sep 2006 The Netherlands 2⁶·11 Posts	k=733 , searched to n=4 million. Busy searching up to 5M. No new primes so far. Hopefully more luck next year (or in the few days remaining of this year).

2016-01-01, 23:03	#398
firejuggler Apr 2010 Over the rainbow 2,539 Posts	fermat, 201601012^n+1.... prime found so far : 201601012^5867+1 201601012^19977+1 201601012^21207+1 201601012^24393+1 201601012^27869+1 201601012^93615+1 201601012^98883+1 201601012^137747+1 201601012^169797+1 20160101*2^194597+1

2017-05-16, 16:05	#400
vasyannyasha "Vasiliy" Apr 2017 Ukraine 3C₁₆ Posts	k=*6371* from n=10000 to 100000 Found 1 prime: 6371*2^62318-1 is prime! (18764 decimal digits)

2020-02-08, 02:42	#407
storm5510 Random Account Aug 2009 19·101 Posts	If I read it right, the smallest value in the top 5000 list has 429,390 digits. Why separate ones larger here?