1 948 699 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
1876850467871	13	40.8	old
2223473575031797471	19	60.9	2016-03-17 12:39:50
295558393208271600569	21	68.0	2021-02-14 05:48:47

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	131 / 640

Estimated T-Level: 26.0 ⓘ

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	B046EFABAAC845B6	2	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	B046EFABAAC845B6	2	1411154	1	3
Verified	2021-02-14	ViliamF	64C017E542FD3870	3	1735329	5	3

History

Date	User	Type	Result
2021-02-14	jovada	CERT	PRP Certification Proof certified good
2021-02-14	ViliamF	C-PRP	M1948699/1876850467871/2223473575031797471/295558393208271600569 : 64C017E542FD3870 PRP proof power = 7 PRP: Verified Proof certified good
2021-02-14	_p95holder_	F-ECM	Factor: 295558393208271600569 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1948699/1876850467871/2223473575031797471 : B046EFABAAC845B6 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1948699/1876850467871/2223473575031797471 : B046EFABAAC845B6 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-03-17	TJAOI	F	Factor: 2223473575031797471 / TF: 60-61