11 638 427 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 =	12582912
B2 =	109573764300

ECM

Digits	B1	Curves
25	50000	208 / 280

Estimated T-Level: 23.7 ⓘ

Status	Date	User	Residue	Shift
Verified	2001-07-29	Ron Lavallee	9FDB2D77252C98AE	11421255
Verified	2004-06-21	Daniel Pokrywczynski	9FDB2D77252C98AE	10336697

History

Date	User	Type	Result
2025-03-10	yuriy_5-1	NF	no factor from 2^74 to 2^75
2024-12-02	yuriy_5-1	NF	no factor from 2^73 to 2^74
2024-08-08	yuriy_5-1	NF	no factor from 2^72 to 2^73
2024-05-03	yuriy_5-1	NF-PM1	B1=12582912, B2=109573764300
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
2021-08-07	SRBase	NF	no factor from 2^69 to 2^70
2019-12-09	riccardo uberti	NF-PM1	B1=430000, B2=8500000, E=12
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
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