277 889 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
1488929263	10	30.5	old
5242972874454439	16	52.2	2014-08-01 12:23:51
240277746620929976586118559	27	87.6	2022-01-03 19:08:52

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	532 / 640

Estimated T-Level: 29.2 ⓘ

TF below 2^92 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-24	Oliver Kruse	2E54C03570D16CB1	2	0	1	3
Verified (Factored)	2017-10-12	Oliver Kruse	2E54C03570D16CB1	2	70916	1	3
Verified (Factored)	2017-11-06	kkmrkkblmbrbk	2E54C03570D16CB1	2	240151	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	D27EAEF6EA11DADC	2	228032	5	3
Verified	2022-01-03	SRJ2877	D27EAEF6EA11DADC	3	114610	5	3

History

Date	User	Type	Result
2023-03-19	Naegi Makoto	NF-PM1	B1=2000000, B2=79396947630
2022-01-03	doctor_e	CERT	PRP Certification Proof certified good
2022-01-03	SRJ2877	C-PRP	M277889/1488929263/5242972874454439/240277746620929976586118559 : D27EAEF6EA11DADC PRP proof power = 5 PRP: Verified Proof certified good
2022-01-03	_p95holder_	F-ECM	Factor: 240277746620929976586118559 / (ECM curve 5, B1=250000, B2=25000000)
2022-01-03	Lisander Viaene	NF-PM1	B1=100000
2020-04-17	Oliver Kruse	C-PRP	M277889/1488929263/5242972874454439 : D27EAEF6EA11DADC PRP: Verified (Factored) PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M277889/1488929263/5242972874454439 : 2E54C03570D16CB1 PRP: Verified (Factored) PRP without proof (small exponent)
2017-10-12	Oliver Kruse	C-PRP	M277889/1488929263/5242972874454439 : 2E54C03570D16CB1 PRP: Verified (Factored) PRP without proof (small exponent)
2017-09-24	Oliver Kruse	C-PRP	M277889/1488929263/5242972874454439 : 2E54C03570D16CB1 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M277889/1488929263/5242972874454439 : 2E54C03570D16CB1 PRP without proof (not generated)
2014-08-01	TJAOI	F	Factor: 5242972874454439