1 867 883 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
124046110031	12	36.9	old
3428301250903	13	41.6	2008-07-15 07:47:37
85412419748993671	17	56.2	2015-03-19 12:30:46
31925706746610570580439	23	74.8	2021-03-23 23:42:23
164543803283955258868921	24	77.1	2021-09-03 08:17:14

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)	2017-10-05	Oliver Kruse	28CA36E0F56FA00E	3	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	28CA36E0F56FA00E	3	412173	1	3
Verified (Factored)	2021-03-24	Oliver Kruse	10DC95EE2F59D218	4	265740	5	3
Verified	2021-09-04	SRJ2877	10DC95EE2F59D218	5	1369873	5	3

History

Date	User	Type	Result
2021-09-04	Simon Josefsson	CERT	PRP Certification Proof certified good
2021-09-04	SRJ2877	C-PRP	M1867883/124046110031/3428301250903/85412419748993671/31925706746610570580439/164543803283955258868921 : 10DC95EE2F59D218 PRP proof power = 7 PRP: Verified Proof certified good
2021-09-03	TJAOI	F-ECM	Factor: 164543803283955258868921 / (ECM curve 55, B1=50000, B2=6600000)
2021-03-24	curtisc	CERT	PRP Certification Proof certified good
2021-03-24	Oliver Kruse	C-PRP	M1867883/124046110031/3428301250903/85412419748993671/31925706746610570580439 : 10DC95EE2F59D218 PRP proof power = 7 PRP: Verified (Factored) Proof certified good
2021-03-23	_p95holder_	F-ECM	Factor: 31925706746610570580439 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1867883/124046110031/3428301250903/85412419748993671 : 28CA36E0F56FA00E PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1867883/124046110031/3428301250903/85412419748993671 : 28CA36E0F56FA00E PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1867883/124046110031/3428301250903/85412419748993671 : 28CA36E0F56FA00E PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-03-19	TJAOI	F	Factor: 85412419748993671 / TF: 56-57
2008-07-15	J Feitsma	F	Factor: 3428301250903