4 855 049 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 =	4100000
B2 =	10697308050

ECM

Digits	B1	Curves
25	50000	104 / 280

Estimated T-Level: 21.9 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-06-28	INTERSHOP Communications	1D0A18953E0F2C0E	0
Verified	2000-03-15	Tamas Vincze	1D0A18953E0F2C0E	4364995

History

Date	User	Type	Result
2024-12-18	Andrew B	NF	no factor from 2^71 to 2^72
2023-03-18	Sid & Andy	NF-PM1	B1=4100000, B2=10697308050
2020-12-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2020-12-03	-Anonymous-	NF	no factor from 2^69 to 2^70
2020-12-03	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-05-08	ramgeis	NF	no factor from 2^67 to 2^68
2017-11-09	Yxinity	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-20	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-12-22	David Campeau	NF-PM1	B1=410000, B2=11070000, E=12
2011-09-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-26	markr	NF	no factor from 2^61 to 2^62
2009-09-18	Carsten Kossendey	NF-PM1	B1=30000, B2=435000