is 2 2624539 - 1
has 790065 decimal digits
takes 0.203 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBF2094C97D1E73E2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.321667.1642%2000000600000000.57797.6853%11.899569.6877%2.5235%
PrimeNet2590.029362.7119%110002000000.00242.6995%0.031663.7185%1.0066%
GPU722630.608165.0794%130002000000.00261.5718%0.610765.6282%0.5489%
Difference+4+10.7135+2.0848%+1987000+59800000+0.5753+6.1136%+11.2887+4.0595%+4.0595%

Known prime factors (1 factor, 69.0 bits, 0.00262988% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
26245395994914716026700871832169.022114208908993669
3 × 7 × 29 × 73 × 2568974717
2017-11-0373256897471755.63515.67529.277

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-31T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.295%
2003-11-08T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.915%
2010-12-21T22:27:00Jocelyn LaroucheManual testing2000020000---0.002--0.317%
2010-12-26T02:29:00Jocelyn LaroucheManual testing3000030000---0.003--0.435%
2011-01-19T23:50:00Jocelyn LaroucheManual testing5000050000---0.006--0.623%
2011-04-20T06:03:00James HeinrichWHS1750004243750---0.044--3.575%
2016-12-24T02:28:33Jocelyn Larouchelow 4M149299149299---0.017--1.192%
2016-12-24T22:38:21Jocelyn Larouchelow 4M179158179158---0.020--1.311%
2016-12-26T22:14:21Jocelyn Larouchelow 4M214989214989---0.024--1.436%
2017-04-22T17:25:09Jocelyn Larouchelow 4M35000035000006---0.058--3.757%
2019-07-04T12:43:05alpertronManual testing20000006000000012---0.578--7.685%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-26T00:00:00ANONYMOUSv4_computers21259--0.029--
2016-02-23T16:29:17Mark RoseManual testing259260--0.029--
2009-02-01T00:28:00Sturle Sundeeames.ifi260261--0.059--
2012-06-15T22:06:00markroldgamer261262--0.117--
2013-01-14T11:57:00dbaughManual testing262263--0.374--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.748--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.424--
2016-01-17T23:07:16ramgeisManual testing265266--2.847--
2017-08-30T21:12:49Gordon SpenceManual testing266267--5.695--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.757 GHz-days
Estimated T-Level:1.250
DigitsB1CurvesCompleteFacMiss
201100025 / 1000.25077.782%
255000025 / 2800.08991.444%

New Calculation Method

Total ECM effort:2.757 GHz-days
Estimated T-Level:1.250
DigitsB1CompleteFacMiss
20110000.82143.989%
25500000.07492.888%
302500000.00599.548%


ECM Summary

B1B2factorcurvesGHz-days
500005000030.179
500005000000242.475
50000500000010.103


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-23T00:00:00ANONYMOUSv4_computersBF2094C97D1E73E20.203


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-04T05:29:37Oliver KruseGTX-2
599491471602670087183
B9796189136DF4__no
2017-12-02T18:46:32kkmrkkblmbrbkc4.xlarge
599491471602670087183
B9796189136DF4__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 350000, B2 = 3500000 (P-1 stage 2)
B1 = 175000, B2 = 4243750 (P-1 stage 2)
B1 = 350000 (P-1 stage 1)
B1 = 214989 (P-1 stage 1)
B1 = 179158 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 149299 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-07-04T12:43:05+00:00