1 863 971 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
14911769	8	23.8	old
193869571336390226087	21	67.4	2020-07-31 02:22:54

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	132 / 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)	2017-10-04	Oliver Kruse	88509C40903C3D7E	1	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	88509C40903C3D7E	1	756656	1	3
Verified	2020-07-31	M Miller	02CA29EAD8203B07	2	1141191	5	3
Verified	2020-07-31	marssystems	02CA29EAD8203B07	2	478023	5	3

History

Date	User	Type	Result
2020-07-31	marssystems	C-PRP	M1863971/14911769/193869571336390226087 : 02CA29EAD8203B07 PRP: Verified PRP without proof (not generated)
2020-07-31	M Miller	C-PRP	M1863971/14911769/193869571336390226087 : 02CA29EAD8203B07 PRP: Verified PRP without proof (not generated)
2020-07-31	_p95holder_	F-ECM	Factor: 193869571336390226087 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-07	kkmrkkblmbrbk	C-PRP	M1863971/14911769 : 88509C40903C3D7E PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1863971/14911769 : 88509C40903C3D7E PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12