is 2 25176341 - 1
has 7578834 decimal digits
takes 21.575 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA7C17C8FEBD03F25double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual274151.962766.2162%3800003800000.47221.1366%152.434966.6002%
Target2709.491164.2857%18000055000000.58383.7361%10.074965.6201%
Difference+4+142.4717+1.9305%+200000-5120000-0.1116-2.5995%+142.3600+0.9802%

Known prime factors:
No known factors for M25176341

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-11-27ANONYMOUSv4_computers380000380000---0.472--1.137%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12Net_Forcev4_computers21256--0.000--
2001-08-24Mattv4_computers21258--0.002--
2003-12-13markrv4_computers21262--0.024--
2004-04-09korvav4_computers21267--1.180--
2016-01-04VictordeHollanderManual testing267268--1.187--
2017-06-12ramgeisManual testing268269--2.375--
2017-06-12ramgeisManual testing269270--4.749--
2021-06-08mikrManual testing270271--9.498--
2021-08-28TheJudgerManual testing271272--19.00--
2021-08-28TheJudgerManual testing272273--37.99--
2021-09-13TheJudgerManual testing273274--75.98--


ECM factoring results:
No ECM results for M25176341


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2006-07-25ANONYMOUSv4_computersA7C17C8FEBD03F2521.57
2011-01-29ANONYMOUSSrvrP00A7C17C8FEBD03F2521.57


PRP results:
No PRP results for M25176341


P-1 factor-bounds graph:
B1 = 380000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
267
262
258
256
this exponent TF target: 70
TF double-checked to: 67.7
250
260
270
280
Last modified: 2021-09-13T17:01:59+00:00