1 549 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
168920851817441	15	47.3	old
7051863324605499849483215166120814618029888281331456062662199692938569	70	232.0	2017-09-24 04:36:23

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	156702 / 194238

Estimated T-Level: 64.0 ⓘ

TF below 2^208 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-21	Oliver Kruse	3D0E287FF421CC8C	1	0	1	3
Verified	2017-09-24	Oliver Kruse	B6076B0E9FD76AF2	2	0	1	3
Verified	2017-10-09	Chang Chia-Tche	B6076B0E9FD76AF2	2	0	1	3
Verified	2017-10-13	Oliver Kruse	B6076B0E9FD76AF2	2	382	1	3
Verified	2020-04-17	Oliver Kruse	DC1ADF1DF69CA8E7	2	1027	5	3
Verified	2020-08-12	_p95holder_	DC1ADF1DF69CA8E7	2	611	5	3

History

Date	User	Type	Result
2021-07-21	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-08-12	_p95holder_	C-PRP	M1549/168920851817441/7051863324605499849483215166120814618029888281331456062662199692938569 : DC1ADF1DF69CA8E7 PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1549/168920851817441/7051863324605499849483215166120814618029888281331456062662199692938569 : DC1ADF1DF69CA8E7 PRP: Verified PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M1549/168920851817441/7051863324605499849483215166120814618029888281331456062662199692938569 : B6076B0E9FD76AF2 PRP: Verified PRP without proof (small exponent)
2017-10-09	Chang Chia-Tche	C-PRP	M1549/known_factors : B6076B0E9FD76AF2 PRP: Verified PRP without proof (not generated)
2017-09-24	Oliver Kruse	C-PRP	M1549/168920851817441/7051863324605499849483215166120814618029888281331456062662199692938569 : B6076B0E9FD76AF2 PRP without proof (not generated)
2017-09-24	-Anonymous-	F-ECM	Factor: 7051863324605499849483215166120814618029888281331456062662199692938569
2017-09-21	Oliver Kruse	C-PRP	M1549/168920851817441 : 3D0E287FF421CC8C PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1549/168920851817441 : 3D0E287FF421CC8C PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12