is 2 7391927 - 1
has 2225192 decimal digits
takes 1.612 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2981AA55E22F5EB0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.019865.6716 %350003675000.01681.6744 %4.036666.2464 %
Target2674.019865.6716 %5000055000000.10972.4316 %4.129566.5064 %
Difference----15000-5132500-0.0929-0.7572 %-0.0929-0.2599 %

Known prime factors (1 factor, 70.2 bits, 0.00094901% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
739192713103494480318362716632270.15088633819573153
73 × 97 × 7873 × 1589881
2012-08-297873158988145.8610.02970.0512

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-01-08Lars Lindleyv4_computers35000367500--0.0171.674%
2012-08-29NesowaEPC2270.1500.0550.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-06ANONYMOUSv4_computers212620.042
1999-03-15ANONYMOUSv4_computers212630.133


ECM factoring results:
No ECM results for M7391927


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-07ANONYMOUSv4_computers2981AA55E22F5EB01.612
1999-10-07ANONYMOUSv4_computers2981AA55E22F5EB01.612
1999-12-01ANONYMOUSv4_computers2981AA55E22F5EB01.612
2000-01-12ANONYMOUSv4_computers2981AA55E22F5EB01.612
2002-02-03Lars Lindleyv4_computers2981AA55E22F5EB01.612


PRP results:
dateuseridcompidcofactorsres64
2018-03-09Oliver KruseGTX-1
1310349448031836271663
CD9A1755DE6D257C
2019-05-26krackerGRID-11
1310349448031836271663
CD9A1755DE6D257C


CERT results:
No CERT results for M7391927


P-1 factor-bounds graph:
B1 = 35000, B2 = 367500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00