51 992 021 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 2⁷³

TF target 2⁷³

P-1

B1 =	500000
B2 =	9500000

Status	Date	User	Residue	Shift
Verified	2012-05-10	Ge yong	139EAF8AA339ACF2	1831426
Verified	2019-06-12	ChavdarLalov	139EAF8AA339ACF2	19287028

History

Date	User	Type	Result
2019-06-12	ChavdarLalov	C-LL	139EAF8AA339ACF2
2016-02-23	Mark Rose	NF	no factor from 2^60 to 2^63
2016-01-15	AirSquirrels	NF	no factor from 2^72 to 2^73
2012-05-10	Ge yong	C-LL	139EAF8AA339ACF2
2012-04-12	markr	NF-PM1	B1=500000, B2=9500000
2012-04-04	Xyzzy	NF	no factor from 2^71 to 2^72
2012-04-04	Xyzzy	NF	no factor from 2^70 to 2^71
2012-01-21	Kyle Askine	NF	no factor from 2^69 to 2^70
2010-04-03	Lawrence V. Castiglione III	NF	no factor from 2^68 to 2^69
2009-08-17	S00030	NF	no factor from 2^67 to 2^68
2008-12-12	Tihy	NF	no factor from 2^66 to 2^67
2008-12-11	Tihy	NF	no factor from 2^65 to 2^66
2008-12-08	Tihy	NF	no factor from 2^64 to 2^65
2008-12-07	jemand	NF	no factor from 2^63 to 2^64