1 699 091 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
192544642263996761113	21	67.4	2015-02-11 09:05:01

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Horng-Ming Chen	8E79C0ED2BC27747	0
Verified (Factored)		Alessandro Vannini	8E79C0ED2BC27747	0
Bad		Bob Taylor	3D2676433D1B83B0	0

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	FD95185B179F591E	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-03	Oliver Kruse	0B9473B7494C0D12	1	0	1	3
Verified	2017-11-03	ATH	0B9473B7494C0D12	1	662720	1	3

P-1 factors

Date	Factor	B1	B2
2015-02-11	192544642263996761113	10000000	200000000

History

Date	User	Type	Result
2025-09-03	Dmitriy Karpukhin	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	FD95185B179F591E PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2022-03-08	LordJulius	NF	no factor from 2^58 to 2^60
2017-11-03	ATH	C-PRP	M1699091/192544642263996761113 : 0B9473B7494C0D12 PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1699091/192544642263996761113 : 0B9473B7494C0D12 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-02-11	VictordeHollander	F-PM1	Factor: 192544642263996761113 / (P-1, B1=10000000, B2=200000000, E=12)
2015-02-02	Joss	NF-PM1	B1=309830
2015-01-30	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-30	VictordeHollander	NF	no factor from 2^63 to 2^64
2015-01-05	Joss	NF-PM1	B1=281664
2014-10-01	Joss	NF-PM1	B1=187776
2014-05-01	-Anonymous-	NF-PM1	B1=150000
2014-03-31	Joss	NF-PM1	B1=100000
2011-02-08	Carsten Kossendey	NF-PM1	B1=90000, B2=1485000, E=6
2011-01-27	Joss	NF-PM1	B1=50000
2010-09-26	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-25	Architects Cubed	NF	no factor from 2^60 to 2^61