166 125 121 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with PRP test

No factors below 2⁷⁶

TF target 2⁷⁸

P-1

B1 =	1478000
B2 =	1810392276

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	Certified Good Power=8	2025-03-24	Anton Tsvetkov	69115841B1454291	100232715	1	3

History

Date	User	Type	Result
2025-03-25	proski	CERT	Proof certified good
2025-03-24	Anton Tsvetkov	C-PRP	69115841B1454291 Proof Certified Good Proof Power: 8
2024-11-05	Architects Cubed	NF	no factor TF: 75-76
2024-08-05	Luke Durant	NF-PM1	B1=1478000, B2=1810392276
2023-03-12	SRBase	NF	no factor TF: 74-75
2021-12-10	SRBase	NF	no factor TF: 73-74
2018-08-16	Smok_bmv	NF	no factor TF: 72-73
2018-01-28	Craig Johnson	NF	no factor TF: 71-72
2018-01-24	workerthread	NF	no factor TF: 70-71
2017-05-02	La Güira	NF	no factor TF: 69-70
2017-05-02	La Güira	NF	no factor TF: 68-69
2016-03-31	XZT	NF	no factor TF: 67-68
2015-05-28	barrakouda	NF	no factor TF: 66-67
2013-03-15	sasaki3	NF	no factor TF: 65-66
2011-02-11	runesk	NF	no factor TF: 64-65
2010-07-05	sasaki3	NF	no factor TF: 63-64