4 209 209 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁷²

TF target 2⁶⁵

P-1

B1 =	6200000
B2 =	15965654250

ECM

Digits	B1	Curves
25	50000	27 / 280

Estimated T-Level: 20.5 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-03-03	Seth Chazanoff	2B3CFA4952C6C865	0
Verified	1999-12-01	Ed B	2B3CFA4952C6C865	260817

History

Date	User	Type	Result
2022-04-06	DRobinsonPE	NF-PM1	B1=6200000, B2=15965654250
2021-01-24	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-01-24	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-01-23	-Anonymous-	NF	no factor from 2^69 to 2^70
2021-01-23	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-12-15	Yxinity	NF	no factor from 2^67 to 2^68
2018-11-12	chuenkit	NF	no factor from 2^67 to 2^68
2017-12-27	Yxinity	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-24	David Campeau	NF-PM1	B1=1145000, B2=30915000, E=12
2015-06-07	snme2pm1	NF	no factor from 2^65 to 2^66
2013-11-19	David Campeau	NF	no factor from 2^64 to 2^65
2013-11-08	Jayder	NF	no factor from 2^63 to 2^64
2012-01-19	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-12-06	Squeeky_Squirrel	NF-PM1	B1=75000, B2=1368750, E=6
2011-08-11	Squeeky_Squirrel	NF-PM1	B1=50000, B2=737500, E=6
2010-12-22	markr	NF	no factor from 2^61 to 2^62
2009-08-02	Carsten Kossendey	NF-PM1	B1=25000, B2=337500