11 640 509 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 2⁷⁵

TF target 2⁶⁸

P-1

B1 =	12688156
B2 =	111034753830

ECM

Digits	B1	Curves
25	50000	196 / 280

Estimated T-Level: 23.5 ⓘ

Status	Date	User	Residue	Shift
Verified		C. Cooper / S. Boone	E9ADB95A56082504	0
Verified	2005-02-12	Shane Sanford	E9ADB95A56082504	8728630
Verified	2005-02-18	Daniel Swanson	E9ADB95A56082504	5294989

History

Date	User	Type	Result
2025-03-12	yuriy_5-1	NF	no factor from 2^74 to 2^75
2024-12-06	yuriy_5-1	NF	no factor from 2^73 to 2^74
2024-08-16	yuriy_5-1	NF	no factor from 2^72 to 2^73
2024-05-21	yuriy_5-1	NF-PM1	B1=12688156, B2=111034753830
2022-12-08	Naegi Makoto	NF	no factor from 2^71 to 2^72
2021-08-15	SRBase	NF	no factor from 2^70 to 2^71
2021-08-06	SRBase	NF	no factor from 2^69 to 2^70
2021-05-02	Architects Cubed	NF-PM1	B1=586000, B2=43916000
2018-01-03	ramgeis	NF	no factor from 2^68 to 2^69
2018-01-03	ramgeis	NF	no factor from 2^67 to 2^68
2016-01-30	VictordeHollander	NF	no factor from 2^66 to 2^67
2015-05-08	Sid & Andy	NF-PM1	B1=125000, B2=2187500, E=6
2014-12-20	Nesowa	NF	no factor from 2^65 to 2^66
2013-11-04	lycorn	NF	no factor from 2^64 to 2^65