12 872 759 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 =	2000000
B2 =	5508839700

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-01-28	Luigi Morelli	CE6A6D7F8556763D	11107184
Verified	2003-12-02	MartinHvidberg	CE6A6D7F8556763D	9145152

History

Date	User	Type	Result
2024-06-11	linament	NF-PM1	B1=2000000, B2=5508839700
2024-06-10	linament	NF-PM1	B1=2000000
2024-04-24	Sid & Andy	NF	no factor from 2^72 to 2^73
2021-10-29	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-08-31	SRBase	NF	no factor from 2^70 to 2^71
2021-08-07	SRBase	NF	no factor from 2^69 to 2^70
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
2015-04-11	Tha	NF	no factor from 2^66 to 2^67
2014-04-27	Nesowa	NF	no factor from 2^65 to 2^66
2013-06-02	lycorn	NF	no factor from 2^64 to 2^65