is 2 1982713 - 1
has 596857 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L88A21426496A5216double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26714.986568.6567 %1000000300000000.24606.2475 %15.232570.6149 %
Target2620.309966.1290 %80005000000.00331.1975 %0.313266.5346 %
Difference+5+14.6766+2.5277 %+992000+29500000+0.2427+5.0499%+14.9193+4.0802 %

Known prime factors (1 factor, 71.2 bits, 0.00359060% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
198271326958208003302547587432271.191679831322115267
33 × 7 × 23 × 71 × 2202688991
2016-02-14712202688991241.1211.44121.369

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-01-24kurlyhex10000003000000012--0.2469.653%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-27ANONYMOUSv4_computers212580.019
2016-02-23Mark RoseManual testing2582600.058
2009-12-18S485122USB-W2602610.077
2016-02-23Mark RoseManual testing2612620.155
2011-07-01GrunwalderGIMPManual testing212630.805
2016-02-23Mark RoseManual testing2622630.495
2015-03-14lycornManual testing2632640.990
2015-03-14lycornManual testing2642651.884
2015-09-11ramgeisManual testing2652663.769


ECM factoring results:
Total ECM effort:25.665 GHz-days
Estimated T-Level:25.328
DigitsB1CompleteFacMiss
201100010.8600.002%
25500001.02835.785%
302500000.06693.646%
3510000000.00399.691%


ECM Summary

B1B2factorcurvesGHz-days
500005000000251.869
50000500000020.147
50000530000070.606
50000560000070.539
50000698425570.596
50000750000021321.63
95000950000020.279


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02ANONYMOUSv4_computers88A21426496A52160.130
2015-07-03MadPooManual testing88A21426496A52160.130


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-1
2695820800330254758743
F76144245D2D226E
2017-11-12kkmrkkblmbrbkc4.xlarge
2695820800330254758743
F76144245D2D226E


CERT results:
No CERT results for M1982713


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
266
265
264
263
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.33 ~= 68-bit
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Last modified: 2024-02-29T14:28:04+00:00