4 927 189 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
560311369625519	15	49.0	old
2021392447764881517889	22	70.8	2019-08-12 02:43:30

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 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	A10279D2E8269982	1	0	1	3
Verified (Factored)	2018-04-09	ATH	A10279D2E8269982	1	672041	1	3
Verified	2019-08-12	mnd9	973BA0F041A434C0	2	1396969	5	3
Verified	2019-08-12	ATH	973BA0F041A434C0	2	3246010	5	3

History

Date	User	Type	Result
2023-09-20	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-08-12	ATH	C-PRP	M4927189/560311369625519/2021392447764881517889 : 973BA0F041A434C0 PRP: Verified PRP without proof (not generated)
2019-08-12	mnd9	C-PRP	M4927189/560311369625519/2021392447764881517889 : 973BA0F041A434C0 PRP: Verified PRP without proof (not generated)
2019-08-12	MarkS	F-ECM	Factor: 2021392447764881517889 / (ECM curve 3, B1=50000, B2=5000000)
2018-04-09	ATH	C-PRP	M4927189/560311369625519 : A10279D2E8269982 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4927189/560311369625519 : A10279D2E8269982 PRP: Verified PRP without proof (not generated)