is 2 24557627 - 1
has 7392583 decimal digits
takes 19.919 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7910988573326FE1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27377.892165.7534 %960000539550004.52495.3058 %82.416967.5705 %
Target2709.730264.2857 %170000250000001.79103.6187 %11.521265.5781 %
Difference+3+68.1619+1.4677 %+790000+28955000+2.7339+1.6871%+70.8957+1.9924 %

Known prime factors (1 factor, 95.1 bits, 0.00038713% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24557627415765208663244377859830555692995.070846509332239724094392
23 × 11 × 157 × 317 × 5297 × 13711 × 2661283
2021-08-15137112661283538,331,9230.18580.3185

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2004-06-04ANONYMOUSv4_computers370000370000--0.4351.821%
2021-08-15Dylan DelgadoColab9600005395500022995.0704.5256.928%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-09-16Net_Forcev4_computers212560.000
2001-12-08Mattv4_computers212580.002
2003-08-08Net_Forcev4_computers212600.003
2004-02-23tscv4_computers212670.609
2016-05-24VictordeHollanderManual testing2672681.217
2018-02-24VictordeHollanderManual testing2682692.434
2018-09-18ramgeisManual testing2692704.869
2021-08-06SRBaseManual testing2702719.74
2021-08-12Sid & AndyManual testing27127358.42


ECM factoring results:
No ECM results for M24557627


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-07-13ANONYMOUSv4_computers7910988573326FE119.92
2011-06-02Frank Siwiec7910988573326FE119.92


PRP results:
No PRP results for M24557627


CERT results:
No CERT results for M24557627


P-1 factor-bounds graph:
B1 = 960000, B2 = 53955000 (P-1 stage 2)
B1 = 960000 (P-1 stage 1)
B1 = 370000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
273
271
270
269
268
267
260
258
256
this exponent TF target: 70
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00