74 521 277 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 2⁷⁴

P-1

B1 =	635000
B2 =	11747500

Status	Date	User	Residue	Shift
Unverified	2016-04-18	Klaus Fleischmann	DD30A99863D7DD__	55890254

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-11-28	Luke Durant	FD1AE241771ABC7A	0	1	3

History

Date	User	Type	Result
2024-11-28	stenlei	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-11-28	Luke Durant	C-PRP	FD1AE241771ABC7A PRP proof power = 9 PRP: Verified Proof certified good
2016-04-18	Klaus Fleischmann	C-LL	DD30A99863D7DD__
2016-04-02	Mark Rose	NF	no factor from 2^57 to 2^64
2015-12-27	Danath	NF-PM1	B1=635000, B2=11747500
2015-12-20	TheJudger	NF	no factor from 2^74 to 2^75
2015-12-20	TheJudger	NF	no factor from 2^73 to 2^74
2015-11-23	ixfd64	NF	no factor from 2^72 to 2^73
2015-08-20	Judge Hale	NF	no factor from 2^71 to 2^72
2013-12-02	Cornelius Caesar	NF	no factor from 2^70 to 2^71
2012-10-22	David Barley	NF	no factor from 2^69 to 2^70
2010-08-30	S00030	NF	no factor from 2^68 to 2^69
2010-08-29	trif	NF	no factor from 2^67 to 2^68
2010-07-30	Xorsist	NF	no factor from 2^66 to 2^67
2010-07-29	Bold_Seeker	NF	no factor from 2^65 to 2^66
2010-07-28	riccardo uberti	NF	no factor from 2^64 to 2^65