is 2 1892497 - 1
has 569699 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L982B1DAE4DC04B4Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.700968.6567%27500060000000.04623.9339%15.747169.8897%1.2330%
PrimeNet2570.010163.1579%90001600000.00143.0358%0.011564.2763%1.1185%
GPU722610.162365.5738%100001600000.00141.7260%0.163766.1680%0.5942%
Difference+6+15.5386+3.0829%+265000+5840000+0.0447+2.2079%+15.5833+3.7218%+3.7218%

Known prime factors (1 factor, 89.4 bits, 0.00472221% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18924977986327524045428223886320392789.368210999740661291093827
7 × 1367 × 1667 × 13227560820449
2014-07-0416671322756082044988,429,36956,690105,881

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-20T19:08:00markrtiny2750006000000---0.046--3.934%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers21258--0.020--
2010-04-11T15:59:00Architects Cubedm1_76l260261--0.081--
2011-03-08T05:18:00GrunwalderGIMPManual testing21263--0.843--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.856 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:19.856 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.8140.015%
25500000.79944.988%
302500000.04995.179%
3510000000.00299.773%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.496
50000500000010.069
50000660000021416.74
50000675000070.553


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers982B1DAE4DC04B4E0.103


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T16:36:16Oliver KruseGTX-0
798632752404542822388632039
DE195204E13E57__no
2017-11-08T21:46:09kkmrkkblmbrbkold
798632752404542822388632039
DE195204E13E57__no


P-1 factor-bounds graph:
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 275000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
263
261
258
250
260
270
280
290
2100
Last modified: 2021-12-03T11:51:20+00:00