11 615 239 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 =	13984750
B2 =	119800600920

ECM

Digits	B1	Curves
25	50000	28 / 280

Estimated T-Level: 20.5 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-03-10	Csaba Kiss	B25DFBEFC921E316	3154721
Verified	2005-02-02	Daniel Swanson	B25DFBEFC921E316	2721110

History

Date	User	Type	Result
2025-01-17	yuriy_5-1	NF	no factor from 2^74 to 2^75
2024-09-02	yuriy_5-1	NF	no factor from 2^73 to 2^74
2024-08-15	vsh	NF	no factor from 2^72 to 2^73
2024-07-03	yuriy_5-1	NF-PM1	B1=13984750, B2=119800600920
2024-04-22	yuriy_5-1	NF	no factor from 2^72 to 2^73
2023-01-02	Naegi Makoto	NF	no factor from 2^71 to 2^72
2021-08-22	LaurV	NF-PM1	B1=6189107, B2=185673210
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
2018-01-09	ramgeis	NF	no factor from 2^68 to 2^69
2018-01-09	ramgeis	NF	no factor from 2^67 to 2^68
2016-01-15	VictordeHollander	NF	no factor from 2^66 to 2^67
2014-12-20	Nesowa	NF	no factor from 2^65 to 2^66
2013-11-05	lycorn	NF	no factor from 2^64 to 2^65
2012-03-18	James Heinrich	NF-PM1	B1=225000, B2=5400000, E=6