11 686 621 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 =	14070694
B2 =	125644559040

ECM

Digits	B1	Curves
25	50000	169 / 280

Estimated T-Level: 23.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2001-01-28	Steve Spicer	2AB8E188F3FA95E6	6518411
Verified	2004-08-06	gerhard Haider	2AB8E188F3FA95E6	687551
Verified	2004-10-03	scott6605	2AB8E188F3FA95E6	6637061

History

Date	User	Type	Result
2025-01-08	yuriy_5-1	NF	no factor from 2^74 to 2^75
2025-01-08	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
2024-06-17	yuriy_5-1	NF-PM1	B1=14070694, B2=125644559040
2022-11-08	Naegi Makoto	NF	no factor from 2^71 to 2^72
2021-08-17	LaurV	NF-PM1	B1=6189107, B2=185673210
2021-08-17	SRBase	NF	no factor from 2^70 to 2^71
2021-08-06	SRBase	NF	no factor from 2^69 to 2^70
2020-01-04	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
2016-02-08	VictordeHollander	NF	no factor from 2^66 to 2^67
2014-12-20	Nesowa	NF	no factor from 2^65 to 2^66
2013-11-02	lycorn	NF	no factor from 2^64 to 2^65