193 789 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^109 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	138062852
B2 =	8872391007480

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1357 / 1566

Estimated T-Level: 34.3 ⓘ

Status	Date	User	Residue	Shift
Verified		Amdahl 6 - 1989	3926BD71	0
Verified		Martin Eibl	EAF74D0DF926BD71	0
Verified		Brian J. Beesley	EAF74D0DF926BD71	0
Verified		Eivind Triel	EAF74D0DF926BD71	43285
Verified	2016-06-01	MadPoo	EAF74D0DF926BD71	1431

History

Date	User	Type	Result
2023-09-02	masser	NF-PP1	Start=82/31, B1=30000000, B2=2370000000
2023-04-12	JacobZ	NF-PM1	B1=138062852, B2=8872391007480
2023-02-25	masser	NF-PP1	Start=6/5, B1=30000000, B2=840000000
2023-01-24	Joss	NF-PM1	B1=1000000, B2=74759955270
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-07-11	ATH	NF-PP1	Start=2/7, B1=50000000, B2=7050000000
2019-12-12	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-01-05	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	EAF74D0DF926BD71
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-12-28	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-28	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-10-17	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2013-08-06	lycorn	NF	no factor from 2^60 to 2^61
2009-02-03	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-26	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59