79 212 281 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 PRP test

TF

No factors below 2⁷⁵

TF target 2⁷⁵

P-1

B1 =	670000
B2 =	13567500

Status	Date	User	Residue	Shift	Type	Base
Verified	2018-04-27	ky0uraku	72B63F21B94AB9D9	56946049	1	3
Verified	2019-04-19	David Lee	72B63F21B94AB9D9	22283479	1	3

History

Date	User	Type	Result
2019-04-19	David Lee	C-PRP	72B63F21B94AB9D9 PRP: Verified PRP without proof (not generated)
2018-04-27	ky0uraku	C-PRP	72B63F21B94AB9D9 PRP: Verified PRP without proof (not generated)
2016-08-20	Nesowa	NF-PM1	B1=670000, B2=13567500, E=12
2016-08-02	CacheOut	NF	no factor from 2^74 to 2^75
2016-08-02	CacheOut	NF	no factor from 2^73 to 2^74
2016-07-26	ANONYMOUS	NF	no factor from 2^72 to 2^73
2016-04-05	Mark Rose	NF	no factor from 2^63 to 2^64
2016-04-05	Mark Rose	NF	no factor from 2^64 to 2^65
2016-02-19	Greg	NF	no factor from 2^71 to 2^72
2013-01-16	xiaowuc1	NF	no factor from 2^70 to 2^71
2012-04-06	Per Jessen	NF	no factor from 2^69 to 2^70
2010-11-25	frigo	NF	no factor from 2^68 to 2^69
2010-11-23	bucky_mb	NF	no factor from 2^67 to 2^68
2010-11-22	Kiwaiti	NF	no factor from 2^66 to 2^67
2010-11-14	S00030	NF	no factor from 2^65 to 2^66