74 415 581 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 =	740000
B2 =	16465000

Status	Date	User	Residue	Shift
Unverified	2017-04-02	arnaud	715C7E8FF16DDA__	24116550

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-11-27	Luke Durant	F87FC9378CD9D73B	0	1	3

History

Date	User	Type	Result
2024-11-27	Xyzzy	CERT	PRP Certification CERT proof power = 9 Proof certified good
2024-11-27	Luke Durant	C-PRP	F87FC9378CD9D73B PRP proof power = 9 PRP: Verified Proof certified good
2017-04-02	arnaud	C-LL	715C7E8FF16DDA__
2016-07-08	-Anonymous-	NF	no factor from 2^74 to 2^75
2016-03-28	Judge Hale	NF	no factor from 2^73 to 2^74
2015-08-23	TheJudger	NF-PM1	B1=740000, B2=16465000, E=12
2015-08-12	Bdot	NF	no factor from 2^72 to 2^73
2015-08-12	Bdot	NF	no factor from 2^71 to 2^72
2013-08-13	Choi4KANG	NF	no factor from 2^70 to 2^71
2012-10-24	SMoffat	NF	no factor from 2^69 to 2^70
2010-07-19	Erik	NF	no factor from 2^68 to 2^69
2010-07-17	Marzbug	NF	no factor from 2^67 to 2^68
2010-07-15	Marzbug	NF	no factor from 2^66 to 2^67
2010-07-09	Marzbug	NF	no factor from 2^65 to 2^66
2010-07-07	linded	NF	no factor from 2^64 to 2^65
2008-09-12	lycorn	NF	no factor to 2^64