is 2 788377 - 1
has 237326 decimal digits
takes 0.016 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L58B60BD587F294EDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26737.690070.1493 %1630000554200000.13216.5712 %37.822172.1108 %
Target2440.000054.5455 %1300025000000.004317.0906 %0.004362.3139 %
Difference+23+37.6900+15.6038 %+1617000+52920000+0.1278-10.5194 %+37.8178+9.7969 %

Known prime factors (1 factor, 77.1 bits, 0.00977664% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7883771593785442140309663035432477.077101080158486378323
72 × 181 × 11397018658967
2014-11-161811139701865896738,82417,98233,586

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-01-02ANONYMOUSv4_computers2000200000--0.00011.897%
2002-02-03ANONYMOUSv4_computers4096409600--0.00114.808%
2002-03-31ANONYMOUSv4_computers8192819200--0.00217.596%
2002-05-18ANONYMOUSv4_computers163841638400--0.00320.349%
2002-07-27ANONYMOUSv4_computers32768327680012--0.00623.060%
2002-12-09ANONYMOUSv4_computers65537655370012--0.01225.719%
2003-07-21ANONYMOUSv4_computers1310721310720012--0.02428.322%
2011-07-10JossManual testing271316271316--0.00816.272%
2011-08-28JossManual testing452193452193--0.01317.858%
2012-01-09JossManual testing904387904387--0.02620.004%
2012-07-21JossManual testing15767541576754--0.04621.713%
2013-10-31David Campeaui5-2500k16300005542000012--0.13234.029%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-10-07ANONYMOUSv4_computers212550.006
2001-02-18ANONYMOUSv4_computers212560.012
2001-12-08ANONYMOUSv4_computers212570.024
2003-09-21ANONYMOUSv4_computers212580.049
2008-10-14Sturle Sundepapageno.ifi2582590.049
2008-10-14Sturle Sundepapageno.ifi2592600.097
2010-06-23Architects Cubeda3_s22602610.195


ECM factoring results:
Total ECM effort:11.320 GHz-days
Estimated T-Level:25.642
DigitsB1CompleteFacMiss
201100014.2690.000%
25500001.57020.807%
302500000.12887.954%
3510000000.00999.144%


ECM Summary

B1B2factorcurvesGHz-days
10.319
5000050000002675.983
25000025000000445.018


Lucas-Lehmer results:
No L-L results for M788377


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-1
159378544214030966303543
58945BA63016964B
2017-10-13Oliver KruseThreadripper-PC
159378544214030966303543
58945BA63016964B
2017-12-16ATHec2-1xh
159378544214030966303543
58945BA63016964B
2020-04-21Oliver KruseAddPrpType5
159378544214030966303543
C36591AADD310635


CERT results:
No CERT results for M788377


P-1 factor-bounds graph:
B1 = 1630000, B2 = 55420000 (P-1 stage 2)
B1 = 1630000 (P-1 stage 1)
B1 = 1576754 (P-1 stage 1)
B1 = 904387 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 452193 (P-1 stage 1)
B1 = 65537, B2 = 6553700 (P-1 stage 2)
B1 = 271316 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65537 (P-1 stage 1)
B1 = 8192, B2 = 819200 (P-1 stage 2)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 8192 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=25.64 ~= 69-bit
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Last modified: 2024-03-03T02:29:32+00:00