4 372 499 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 =	6200000
B2 =	32756371830

ECM

Digits	B1	Curves
25	50000	144 / 280

Estimated T-Level: 22.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1999-11-17	TBWM	C67D853F59A47AA2	4132269
Verified	2000-09-23	Michiel van Loon	C67D853F59A47AA2	0

History

Date	User	Type	Result
2022-12-18	DRobinsonPE	NF-PM1	B1=6200000, B2=32756371830
2021-01-28	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-01-28	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-01-25	-Anonymous-	NF	no factor from 2^69 to 2^70
2021-01-25	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-10-31	Ismo Laitela	NF-PM1	B1=2189464, B2=63494458, E=12
2018-10-29	chuenkit	NF	no factor from 2^67 to 2^68
2018-05-03	chuenkit	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-06-18	snme2pm1	NF	no factor from 2^65 to 2^66
2014-07-13	lycorn	NF	no factor from 2^64 to 2^65
2014-07-12	Jayder	NF	no factor from 2^63 to 2^64
2012-02-10	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-01-04	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2255000, E=6
2010-11-15	markr	NF	no factor from 2^61 to 2^62
2009-08-10	Carsten Kossendey	NF-PM1	B1=25000, B2=356250