12 636 527 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷³

TF target 2⁶⁸

P-1

B1 =	2100000
B2 =	1125496050

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-01-08	Gary Cunningham	70DE12ACA23F78C3	7361540
Verified	2004-08-06	Marc Getty / Phil Fizur	70DE12ACA23F78C3	7955532

History

Date	User	Type	Result
2024-07-18	Sid & Andy	NF	no factor from 2^72 to 2^73
2024-01-12	Sid & Andy	NF-PM1	B1=2100000, B2=1125496050
2021-10-25	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-08-30	SRBase	NF	no factor from 2^70 to 2^71
2021-08-09	SRBase	NF	no factor from 2^69 to 2^70
2019-03-01	riccardo uberti	NF-PM1	B1=430000, B2=8500000, E=12
2018-01-07	ramgeis	NF	no factor from 2^68 to 2^69
2018-01-07	ramgeis	NF	no factor from 2^67 to 2^68
2015-03-28	Tha	NF	no factor from 2^66 to 2^67
2014-04-07	Nesowa	NF	no factor from 2^65 to 2^66
2013-06-16	lycorn	NF	no factor from 2^64 to 2^65