121 717 507 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 2⁷⁷

TF target 2⁷⁷

P-1

B1 =	681000
B2 =	681000

Status	Date	User	Residue	Shift	Type	Base
Verified	2024-01-04	MARSTEC	6745C7275EC34375	120533234	1	3

History

Date	User	Type	Result
2024-01-04	Nick Thorpe	CERT	PRP Certification CERT proof power = 8 Proof certified good
2024-01-04	MARSTEC	C-PRP	6745C7275EC34375 PRP proof power = 8 PRP: Verified Proof certified good
2023-12-17	MARSTEC	NF-PM1	B1=681000
2022-06-24	TheJudger	NF	no factor from 2^76 to 2^77
2021-08-21	TheJudger	NF	no factor from 2^75 to 2^76
2021-08-21	TheJudger	NF	no factor from 2^74 to 2^75
2020-03-03	Niels_Mache_Nextcloud	NF	no factor from 2^73 to 2^74
2020-03-03	Niels_Mache_Nextcloud	NF	no factor from 2^72 to 2^73
2015-07-02	SMoffat	NF	no factor from 2^71 to 2^72
2015-06-20	SMoffat	NF	no factor from 2^70 to 2^71
2013-12-26	-Anonymous-	NF	no factor from 2^69 to 2^70
2013-12-26	-Anonymous-	NF	no factor from 2^68 to 2^69
2013-12-26	-Anonymous-	NF	no factor from 2^66 to 2^68
2012-08-14	carlos56	NF	no factor from 2^65 to 2^66
2010-10-22	Torchwood Institute	NF	no factor from 2^64 to 2^65
2010-05-25	Richard	NF	no factor from 2^63 to 2^64