2 122 489 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
292520908277679503	18	58.0	old
47704786427998596659759	23	75.3	2021-12-19 17:21:28

ECM

Digits	B1	Curves
25	50000	117 / 280

Estimated T-Level: 22.1 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Martin Fahlgren	73E213EC8D2990D2	0
Verified (Factored)	1999-04-23	Olli Heikkilä	73E213EC8D2990D2	298925

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-07	Oliver Kruse	44B5402692EC1E65	1	0	1	3
Verified (Factored)	2017-11-17	kkmrkkblmbrbk	44B5402692EC1E65	1	2108652	1	3
Verified	2021-12-19	MarkS	AFCAEDE4DC1F5292	2	1480908	5	3

History

Date	User	Type	Result
2021-12-19	Derek	CERT	PRP Certification Proof certified good
2021-12-19	MarkS	C-PRP	M2122489/292520908277679503/47704786427998596659759 : AFCAEDE4DC1F5292 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-19	MarkS	F-ECM	Factor: 47704786427998596659759 / (ECM curve 7, B1=50000, B2=5000000, Sigma=8010115298721274)
2017-11-17	kkmrkkblmbrbk	C-PRP	M2122489/292520908277679503 : 44B5402692EC1E65 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-07	Oliver Kruse	C-PRP	M2122489/292520908277679503 : 44B5402692EC1E65 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12