1 831 853 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
52828323860658750421343	23	75.5	2020-11-23 12:53:59
2128357247910781044760727	25	80.8	old

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)		Bruce Loving	B1F294A29275F22C	0
Verified (Factored)	1999-03-26	Ken Finlayson	B1F294A29275F22C	706417

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	E1B3FE18E0BF0ADC	1	0	1	3
Verified (Factored)	2017-11-06	kkmrkkblmbrbk	E1B3FE18E0BF0ADC	1	1064185	1	3
Verified	2020-11-26	Sébastien BROUCKE	C67BFEA714AE8D75	2	864339	5	3
Verified	2020-11-27	Ruzovej	C67BFEA714AE8D75	2	1758670	5	3

History

Date	User	Type	Result
2020-11-27	Ruzovej	C-PRP	M1831853/2128357247910781044760727/52828323860658750421343 : C67BFEA714AE8D75 PRP: Verified PRP without proof (not generated)
2020-11-26	Sébastien BROUCKE	C-PRP	M1831853/2128357247910781044760727/52828323860658750421343 : C67BFEA714AE8D75 PRP: Verified PRP without proof (not generated)
2020-11-23	MarkS	F-ECM	Factor: 52828323860658750421343 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7907994381380826)
2017-11-06	kkmrkkblmbrbk	C-PRP	M1831853/2128357247910781044760727 : E1B3FE18E0BF0ADC PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1831853/2128357247910781044760727 : E1B3FE18E0BF0ADC PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12