is 2 70637821 - 1
has 21264103 decimal digits
takes 188.858 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27454.161763.5135 %6400006400002.48111.6958 %56.642864.1322 %
Target27454.161763.5135 %4500008000000018.54674.0034 %72.708464.9742 %
Difference---+190000-79360000-16.0656-2.3076 %-16.0656-0.8420 %

Known prime factors (1 factor, 83.5 bits, 0.00011816% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
70637821133519945992286972071927912683.46594510238355375495
3 × 5 × 71 × 18973 × 33023 × 141637
2015-02-223302314163743,6690.15100.2605

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-02-22TheJudgerManual testing64000064000012683.4652.6161.696%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2007-10-17Amperiov4_computers212630.014
2008-11-23Wojciech FlorekManual testing212640.028
2010-02-22{WC}PistolPeteSR1030NX2642650.053
2010-03-02BillD22652660.106
2010-03-05BillD22662670.212
2010-03-07oodaira052672680.423
2010-03-08ANONYMOUS2682690.846
2013-04-07SRS TechnologyManual testing26927211.85
2014-11-16NickOfTimeManual testing27227313.54
2014-12-27Sebastian HornbostelManual testing27327427.08


ECM factoring results:
No ECM results for M70637821


Lucas-Lehmer results:
No L-L results for M70637821


PRP results:
No PRP results for M70637821


CERT results:
No CERT results for M70637821


P-1 factor-bounds graph:
B1 = 640000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
274
273
272
269
268
267
266
265
264
263
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00