1 849 733 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
55491991	8	25.7	old
23855759271957814871	20	64.4	2017-09-21 11:31:00
164741620587220705687	21	67.2	2021-03-28 02:24:59

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	2FB883E4AD03FA91	2	0	1	3
Verified (Factored)	2017-11-06	kkmrkkblmbrbk	2FB883E4AD03FA91	2	1443740	1	3
Verified	2021-03-28	rbanov	EE46822ED443F41E	3	1147751	5	3

History

Date	User	Type	Result
2022-08-28	USAFSS	NF-PM1	B1=400000, B2=431631816
2022-04-12	Lisander Viaene	NF-PM1	B1=500100
2021-03-28	Ben Delo	CERT	PRP Certification Proof certified good
2021-03-28	rbanov	C-PRP	M1849733/55491991/23855759271957814871/164741620587220705687 : EE46822ED443F41E PRP proof power = 7 PRP: Verified Proof certified good
2021-03-28	MarkS	F-ECM	Factor: 164741620587220705687 / (ECM curve 7, B1=50000, B2=5000000, Sigma=616234865198640)
2017-11-06	kkmrkkblmbrbk	C-PRP	M1849733/55491991/23855759271957814871 : 2FB883E4AD03FA91 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1849733/55491991/23855759271957814871 : 2FB883E4AD03FA91 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-21	TJAOI	F	Factor: 23855759271957814871 / TF: 64-65