47 611 969 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 2⁷²

P-1

B1 =	560000
B2 =	14560000

Status	Date	User	Residue	Shift
Verified	2009-11-08	Martti Järvi	38B21942DF0EC607	16858804
Verified	2018-09-06	Christoph Zenger	38B21942DF0EC607	11266488
Verified	2018-09-13	endless_mike	38B21942DF0EC607	5651918

History

Date	User	Type	Result
2018-09-13	endless_mike	C-LL	38B21942DF0EC607
2018-09-06	Christoph Zenger	C-LL	38B21942DF0EC607
2017-11-12	Mark Rose	NF	no factor from 2^72 to 2^73
2015-08-14	Greg	NF	no factor from 2^70 to 2^72
2015-08-10	Architects Cubed	NF	no factor from 2^69 to 2^70
2009-11-08	Martti Järvi	C-LL	38B21942DF0EC607
2009-09-28	Martti Järvi	NF-PM1	B1=560000, B2=14560000, E=6