74 486 221 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 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	615000
B2 =	9686250

Status	Date	User	Residue	Shift
Unverified	2015-12-17	Bruce Bostwick	9DFEEB9CC80EF3__	21361989

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-11-27	Luke Durant	C1BDBD1A2BF39123	0	1	3

History

Date	User	Type	Result
2024-11-28	wigglefruit	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-11-27	Luke Durant	C-PRP	C1BDBD1A2BF39123 PRP proof power = 9 PRP: Verified Proof certified good
2024-10-01	masser	NF	no factor from 2^75 to 2^76
2015-12-17	Bruce Bostwick	C-LL	9DFEEB9CC80EF3__
2015-11-08	TheJudger	NF-PM1	B1=615000, B2=9686250
2015-10-25	AirSquirrels	NF	no factor from 2^74 to 2^75
2015-10-25	AirSquirrels	NF	no factor from 2^73 to 2^74
2015-10-14	Bdot	NF	no factor from 2^72 to 2^73
2015-08-19	Judge Hale	NF	no factor from 2^71 to 2^72
2013-05-15	g0b	NF	no factor from 2^70 to 2^71
2012-10-25	Millsie	NF	no factor from 2^69 to 2^70
2010-07-12	UncountedGnome	NF	no factor from 2^68 to 2^69
2010-07-11	DigiK-oz	NF	no factor from 2^67 to 2^68
2010-07-11	Bold_Seeker	NF	no factor from 2^66 to 2^67
2010-07-08	josibo	NF	no factor from 2^65 to 2^66
2010-07-08	HighPriceRanch	NF	no factor from 2^64 to 2^65
2008-09-12	lycorn	NF	no factor to 2^64