1 949 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
4936745974543	13	42.2	old
30788967716321798815506051650468755045353050531649727	53	174.4	2008-10-16 23:57:24

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	67163 / 194238

Estimated T-Level: 61.7 ⓘ

TF below 2^200 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	62CD07B601A5F9E1	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	62CD07B601A5F9E1	2	0	1	3
Verified	2017-12-07	ATH	62CD07B601A5F9E1	2	51	1	3
Verified	2020-04-17	Oliver Kruse	82B87564DD9BB4EE	2	1736	5	3
Verified	2020-08-12	_p95holder_	82B87564DD9BB4EE	2	11	5	3

History

Date	User	Type	Result
2023-01-31	mikr	NF-PM1	B1=400000000000, B2=2575888041040674360
2021-07-26	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2020-08-12	_p95holder_	C-PRP	M1949/4936745974543/30788967716321798815506051650468755045353050531649727 : 82B87564DD9BB4EE PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1949/4936745974543/30788967716321798815506051650468755045353050531649727 : 82B87564DD9BB4EE PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1949/4936745974543/30788967716321798815506051650468755045353050531649727 : 62CD07B601A5F9E1 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1949/4936745974543/30788967716321798815506051650468755045353050531649727 : 62CD07B601A5F9E1 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1949/known_factors : 62CD07B601A5F9E1 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12
2008-10-16	-Anonymous-	F-ECM	Factor: 30788967716321798815506051650468755045353050531649727