4 907 941 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
195960970111649	15	47.5	old
1550970770437757722433	22	70.4	2019-08-01 21:38:41

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	63DC23154AADB38B	1	0	1	3
Verified (Factored)	2018-04-12	Oliver Kruse	63DC23154AADB38B	1	1231969	1	3
Verified	2019-08-01	ATH	00DE36CC23CCA011	2	1444911	5	3
Verified	2019-08-02	kkmrkkblmbrbk	00DE36CC23CCA011	2	437742	5	3

History

Date	User	Type	Result
2022-10-04	USAFSS	NF-PM1	B1=260000, B2=167750730
2019-08-02	kkmrkkblmbrbk	C-PRP	M4907941/195960970111649/1550970770437757722433 : 00DE36CC23CCA011 PRP: Verified PRP without proof (not generated)
2019-08-01	ATH	C-PRP	M4907941/195960970111649/1550970770437757722433 : 00DE36CC23CCA011 PRP: Verified PRP without proof (not generated)
2019-08-01	MarkS	F-ECM	Factor: 1550970770437757722433 / (ECM curve 1, B1=50000, B2=5000000)
2018-04-12	Oliver Kruse	C-PRP	M4907941/195960970111649 : 63DC23154AADB38B PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4907941/195960970111649 : 63DC23154AADB38B PRP: Verified PRP without proof (not generated)