1 921 813 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
980694145964385911	18	59.8	old
31110069998504961460457	23	74.7	2021-11-20 05:13:15
1669438364936250054723697	25	80.5	2024-01-22 11:20:57
60600096798733081434669719	26	85.6	2024-01-22 11:20:57

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)		Harold Clement	63E6F9F359095828	0
Verified (Factored)	1999-01-10	David Alber	63E6F9F359095828	1823081

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	2A08B6368DF5DF3B	1	0	1	3
Verified (Factored)	2017-11-10	kkmrkkblmbrbk	2A08B6368DF5DF3B	1	762182	1	3
Verified (Factored)	2021-11-20	SRJ2877	C8C3B3C5B3F97593	2	1019695	5	3
Verified	2024-01-22	Naegi Makoto	C8C3B3C5B3F97593	4	55102	5	3

History

Date	User	Type	Result
2024-01-22	acra5y	CERT	PRP Certification Proof certified good
2024-01-22	Naegi Makoto	C-PRP	M1921813/980694145964385911/31110069998504961460457/1669438364936250054723697/60600096798733081434669719 : C8C3B3C5B3F97593 PRP proof power = 7 PRP: Verified Proof certified good
2024-01-22	TJAOI	F-ECM	Factor: 1669438364936250054723697 / (ECM curve 2, B1=250000, B2=40000000, Sigma=1215543731361965)
2024-01-22	TJAOI	F-ECM	Factor: 60600096798733081434669719 / (ECM curve 2, B1=250000, B2=40000000, Sigma=8466932177190204)
2021-11-21	Slaine	CERT	PRP Certification Proof certified good
2021-11-20	SRJ2877	C-PRP	M1921813/980694145964385911/31110069998504961460457 : C8C3B3C5B3F97593 PRP proof power = 7 PRP: Verified (Factored) Proof certified good
2021-11-20	_p95holder_	F-ECM	Factor: 31110069998504961460457 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-10	kkmrkkblmbrbk	C-PRP	M1921813/980694145964385911 : 2A08B6368DF5DF3B PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1921813/980694145964385911 : 2A08B6368DF5DF3B PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12