1 881 079 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
470320063434456007	18	58.7	old
936518605029984752863	21	69.7	2020-08-13 17:29:50
8504087192420811895174207	25	82.8	2015-08-26 11:48:34

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)		dean mccully	F23D4ACF56C7D46B	0
Verified (Factored)	1999-03-15	Florin Clapa	F23D4ACF56C7D46B	688797

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	6A4DB51BA72D629F	2	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	6A4DB51BA72D629F	2	1218312	1	3
Verified	2020-08-13	Xyzzy	00826D005AB85087	3	947947	5	3

P-1 factors

Date	Factor	B1	B2
2015-08-26	8504087192420811895174207	500000	15000000

History

Date	User	Type	Result
2020-08-13	Xyzzy	CERT	PRP Certification Proof certified good
2020-08-13	Xyzzy	C-PRP	M1881079/470320063434456007/8504087192420811895174207/936518605029984752863 : 00826D005AB85087 PRP proof power = 7 PRP: Verified Proof certified good
2020-08-13	_p95holder_	F-ECM	Factor: 936518605029984752863 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1881079/470320063434456007/8504087192420811895174207 : 6A4DB51BA72D629F PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1881079/470320063434456007/8504087192420811895174207 : 6A4DB51BA72D629F PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1881079/470320063434456007/8504087192420811895174207 : 6A4DB51BA72D629F PRP without proof (not generated)
2015-08-26	alpertron	F-PM1	Factor: 8504087192420811895174207 / (P-1, B1=500000, B2=15000000, E=12)