50 242 249 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷³

P-1

B1 =	570000
B2 =	12540000

Status	Date	User	Residue	Shift	Software
Verified	2010-06-12	ANONYMOUS	B778A3DEE54D021A	40747135	Windows 64-bit,Prime95,v25.9,build 4
Verified	2020-03-08	Dubslow	B778A3DEE54D021A	31661372	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-06-12	-anonymous-	NF	no factor TF: 74-75
2020-03-08	Dubslow	C-LL	B778A3DEE54D021A
2018-09-19	Mark Rose	NF	no factor TF: 73-74
2015-12-12	AirSquirrels	NF	no factor TF: 72-73
2015-10-18	monst	NF	no factor TF: 71-72
2015-10-18	monst	NF	no factor TF: 70-71
2015-01-10	monst	NF	no factor TF: 69-70
2010-06-12	ANONYMOUS	C-LL	B778A3DEE54D021A
2010-05-08	ANONYMOUS	NF-PM1	B1=570000, B2=12540000
2008-10-04	tmorrow	NF	no factor TF: 1-69
2003-11-08	-anonymous-	NF	no factor TF: 1-60
2003-08-08	-anonymous-	NF	no factor TF: 1-59
2001-12-22	-anonymous-	NF	no factor TF: 1-58
2001-04-01	-anonymous-	NF	no factor TF: 1-57
2000-04-05	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 1-54
2000-01-04	-anonymous-	NF	no factor TF: 1-53
1999-10-07	-anonymous-	NF	no factor TF: 1-53