is 2 2833013 - 1
has 852822 decimal digits
takes 0.219 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1B3937A1071D4844double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.488567.1642%10000030000000.02893.0431%10.517368.1634%0.9992%
PrimeNet2590.027162.7119%120002400000.00272.9333%0.029863.8056%1.0938%
GPU722630.563465.0794%160002600000.00331.8269%0.566665.7173%0.6380%
Difference+4+9.9251+2.0848%+84000+2740000+0.0256+1.2162%+9.9507+2.4461%+2.4461%

Known prime factors (1 factor, 72.3 bits, 0.00255052% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
283301356411475551589709438632272.256995609189784687
3 × 83 × 3998430481063
2013-04-05833998430481063580.7124,39745,567

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-28T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.301%
unknown1000003000000---0.029--3.043%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-02-14T05:14:00Sturle Sundegonzo.ifi260261--0.054--
2012-02-13T12:59:00Grant McCrackenthumper261262--0.108--
2013-01-10T10:23:00dbaughManual testing262263--0.347--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.626 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:0.626 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000060.626


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00ANONYMOUSv4_computers1B3937A1071D48440.219


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-22T08:14:48Oliver KruseGTX-2
5641147555158970943863
B0419B97F72B79__no
2017-12-07T05:42:07kkmrkkblmbrbkc4.xlarge
5641147555158970943863
B0419B97F72B79__no


P-1 factor-bounds graph:
B1 = 100000, B2 = 3000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
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100
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1010
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TF factor-bounds graph:
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261
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Last modified: 2017-12-07T05:42:07+00:00