50 377 781 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 2⁷⁴

TF target 2⁷³

P-1

B1 =	595000
B2 =	16808750

Status	Date	User	Residue	Shift	Software
Verified	2012-03-20	curtisc	D3980AF8D5809C8E	32553934	Windows Service,Prime95,v26.5,build 5
Verified	2020-03-15	Dubslow	D3980AF8D5809C8E	11835855	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-03-15	Dubslow	C-LL	D3980AF8D5809C8E
2018-11-21	Mark Rose	NF	no factor TF: 73-74
2015-12-10	AirSquirrels	NF	no factor TF: 72-73
2012-03-20	curtisc	C-LL	D3980AF8D5809C8E
2012-02-03	megavink	NF	no factor TF: 71-72
2012-02-03	megavink	NF	no factor TF: 70-71
2012-01-01	Craig Meyers	NF	no factor TF: 69-70
2011-09-07	KC	NF-PM1	B1=595000, B2=16808750, E=12
2008-10-04	tryptamine dreamer	NF	no factor TF: 1-69
2003-11-08	-anonymous-	NF	no factor TF: 1-60
2003-08-25	-anonymous-	NF	no factor TF: 1-59
2001-12-22	-anonymous-	NF	no factor TF: 1-58
2001-04-21	-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