is 2 100521557 - 1
has 30260004 decimal digits
takes 383.378 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
Actual276152.245964.4737 %8400008400004.64531.5966 %156.891265.0409 %
Target276152.245964.4737 %65000011000000036.54143.8429 %188.787365.8389 %
Difference---+190000-109160000-31.8961-2.2462 %-31.8961-0.7980 %

Known prime factors (1 factor, 88.1 bits, 0.00008763% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1005215573295543954210391203795818232788.0911639222497424304323
23 × 131 × 137 × 673 × 21661 × 272411
2020-10-2121661272411653,7070.19530.2438

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-10-21Ben Deloi-0e05a50967ee6bbe784000084000012788.0914.6451.597%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-02-081997rj7Manual testing2632640.020
2010-08-10oodairaWin022642650.037
2011-02-17Craig MeyersManual testing2652660.074
2011-03-20Craig MeyersManual testing2662670.149
2014-03-20Andreas_TruetschManual testing2672680.297
2014-05-22SMoffatManual testing2682690.595
2014-05-26SatanManual testing2692701.189
2014-05-27PhilManual testing2702727.137
2020-03-13el groccoGPU72_TF2722739.52
2020-03-18gcardonaManual testing27327419.03
2020-09-04bpotManual testing274276114.2


ECM factoring results:
No ECM results for M100521557


Lucas-Lehmer results:
No L-L results for M100521557


PRP results:
No PRP results for M100521557


CERT results:
No CERT results for M100521557


P-1 factor-bounds graph:
B1 = 840000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
276
274
273
272
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00