4 004 653 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 2⁷²

TF target 2⁶⁵

P-1

B1 =	32037226
B2 =	525494069100

ECM

Digits	B1	Curves
25	50000	163 / 280

Estimated T-Level: 22.9 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-03-09	Jaron Abbott	CAD767C482E8E70C	0
Verified	1999-09-14	David Linton	CAD767C482E8E70C	1900437

History

Date	User	Type	Result
2025-01-17	Random GPUs	NF	no factor from 2^71 to 2^72
2024-09-18	yuriy_5-1	NF-PM1	B1=32037226, B2=525494069100
2022-05-18	DRobinsonPE	NF-PM1	B1=6200000, B2=31912850970
2022-03-20	mikr	NF	no factor from 2^70 to 2^71
2021-05-22	ATH	NF-PP1	Start=2/7, B1=2500000, B2=170000000
2019-03-23	mikr	NF	no factor from 2^69 to 2^70
2019-03-23	mikr	NF	no factor from 2^68 to 2^69
2018-08-25	mikr	NF	no factor from 2^67 to 2^68
2017-10-18	mikr	NF-PM1	B1=4600000, B2=125000000, E=12
2016-08-28	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-05-15	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-01	Nesowa	NF-PM1	B1=225000, B2=4556250, E=6
2013-10-20	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-29	Squeeky_Squirrel	NF-PM1	B1=120000, B2=2280000, E=6
2013-07-21	Jayder	NF	no factor from 2^63 to 2^64
2013-02-08	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1056250, E=6
2010-01-01	Squeeky_Squirrel	NF-PM1	B1=40000, B2=600000, E=4
2009-11-06	GrunwalderGIMP	NF	no factor from 2^1 to 2^63