1 972 007 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
1549997503	10	30.5	old
2887018249	10	31.4	2008-07-15 07:48:50
297641444966757775589745001	27	87.9	2021-05-12 20:34:15

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	56 / 640

Estimated T-Level: 25.4 ⓘ

TF below 2^80 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	6D4EBA5D6E016CAA	2	0	1	3
Verified (Factored)	2017-11-15	kkmrkkblmbrbk	6D4EBA5D6E016CAA	2	1404075	1	3
Verified	2021-05-13	tottenhoff	0319EF1DD80E6B4C	3	1394962	5	3

History

Date	User	Type	Result
2023-12-18	USAFSS	NF-PM1	B1=480000, B2=460965960
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-05-13	Ben Delo	CERT	PRP Certification Proof certified good
2021-05-13	tottenhoff	C-PRP	M1972007/1549997503/2887018249/297641444966757775589745001 : 0319EF1DD80E6B4C PRP proof power = 7 PRP: Verified Proof certified good
2021-05-12	_p95holder_	F-ECM	Factor: 297641444966757775589745001 / (ECM curve 6, B1=50000, B2=5000000)
2017-11-15	kkmrkkblmbrbk	C-PRP	M1972007/1549997503/2887018249 : 6D4EBA5D6E016CAA PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1972007/1549997503/2887018249 : 6D4EBA5D6E016CAA PRP: Verified (Factored) PRP without proof (not generated)
2008-07-15	J Feitsma	F	Factor: 2887018249