is 2 27547279 - 1
has 8292558 decimal digits
takes 25.500 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
Actual2694.333963.7681 %----4.333963.7681 %
Target2708.674264.2857 %200000300000002.44773.9116 %11.121965.6827 %
Difference-1-4.3403-0.5176 %-200000-30000000-2.4477-3.9116 %-6.7880-1.9146 %

Known prime factors (2 factors, 152.3 bits, 0.00055296% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2754727971218446338322844471672272.593129265845708977
41 × 67 × 83 × 367 × 1544831
2005-10-04367154483146.1170.11340.2110
2754727910051956923992225921437612579.73418244917989889720
23 × 3 × 5 × 107 × 359 × 751 × 5270387
2005-10-0475152703874,790.80.38640.7199

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2005-10-04AGGG90v4_computers46152.326-0.000%
2008-07-15George WoltmanManual testing46152.3261.2330.000%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-08-24Net_Forcev4_computers212560.000
2004-07-261997rj7v4_computers212620.011
2005-02-02ANONYMOUSv4_computers212670.543
2024-02-11masserManual testing267269


ECM factoring results:
No ECM results for M27547279


Lucas-Lehmer results:
No L-L results for M27547279


PRP results:
No PRP results for M27547279


CERT results:
No CERT results for M27547279


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
TF factor-bounds graph:
269
267
262
256
this exponent TF target: 70
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00