4 542 457 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 2⁷³

TF target 2⁶⁵

P-1

B1 =	4400000
B2 =	11419636800

ECM

Digits	B1	Curves
25	50000	162 / 280

Estimated T-Level: 22.9 ⓘ

Status	Date	User	Residue	Shift
Bad		Timo Aaltonen and friends	9688AD4D0961B69D	0
Verified	2001-01-14	Kai-ming Poon	F122F5D903094580	1896329
Verified	2001-04-01	Marc Getty / Phil Fizur	F122F5D903094580	391630

History

Date	User	Type	Result
2023-02-08	Sid & Andy	NF-PM1	B1=4400000, B2=11419636800
2021-02-18	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-01-31	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-01-26	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-01-26	-Anonymous-	NF	no factor from 2^69 to 2^70
2021-01-26	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-05-21	ramgeis	NF	no factor from 2^67 to 2^68
2018-05-21	ramgeis	NF	no factor from 2^66 to 2^67
2017-03-06	Ismo Laitela	NF-PM1	B1=1988203, B2=61634303, E=12
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-06-30	snme2pm1	NF	no factor from 2^65 to 2^66
2014-11-29	lycorn	NF	no factor from 2^64 to 2^65
2014-11-28	Jayder	NF	no factor from 2^63 to 2^64
2011-12-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-09-04	markr	NF	no factor from 2^61 to 2^62
2010-08-05	markr	NF-PM1	B1=90000, B2=2002500, E=6