78 251 477 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 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	735000
B2 =	15618750

Status	Date	User	Residue	Shift
Verified	2017-04-26	ChavdarLalov	D9B5C5F8228D03A5	60455452
Verified	2017-05-08	joseluismorales	D9B5C5F8228D03A5	58103407

History

Date	User	Type	Result
2020-05-22	-Anonymous-	NF	no factor from 2^75 to 2^76
2017-05-08	joseluismorales	C-LL	D9B5C5F8228D03A5
2017-04-26	ChavdarLalov	C-LL	D9B5C5F8228D03A5
2016-01-18	AirSquirrels	NF	no factor from 2^74 to 2^75
2015-05-26	aurashift	NF-PM1	B1=735000, B2=15618750, E=12
2014-10-04	blip	NF	no factor from 2^73 to 2^74
2014-10-04	blip	NF	no factor from 2^72 to 2^73
2014-10-04	blip	NF	no factor from 2^71 to 2^72
2013-01-11	JimBa	NF	no factor from 2^70 to 2^71
2011-03-16	ASTERIAS	NF	no factor from 2^69 to 2^70
2011-02-08	Charles Spalton	NF	no factor from 2^68 to 2^69
2011-02-01	Torchwood Institute	NF	no factor from 2^67 to 2^68
2011-01-26	-Anonymous-	NF	no factor from 2^66 to 2^67
2011-01-24	trif	NF	no factor from 2^65 to 2^66
2010-12-25	Syntony	NF	no factor from 2^64 to 2^65