is 2 19253497 - 1
has 5795881 decimal digits
takes 12.274 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L814DB0D6060BA083double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2696.200863.7681 %23000056350000.48484.1716 %6.685665.2796 %
Target2696.200863.7681 %140000200000001.12963.6084 %7.330465.0755 %
Difference---+90000-14365000-0.6448+0.5632%-0.6448+0.2041 %

Known prime factors (1 factor, 75.5 bits, 0.00039209% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19253497531019886058202308565372375.4911379021914975244
22 × 383 × 733 × 1228028449
2019-11-037331228028449397.4361.847115.51

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-05-11ANONYMOUSv4_computers2300005635000--0.4854.172%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-27Net_Forcev4_computers212580.002
2002-02-10Net_Forcev4_computers212590.002
2002-06-02ANONYMOUSv4_computers212660.388
2014-06-15NesowaManual testing2662670.776
2014-06-15NesowaManual testing2672681.553
2017-11-22ramgeisManual testing2682693.105


ECM factoring results:
Total ECM effort:0.984 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.984


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-05-26ANONYMOUSv4_computers814DB0D6060BA08312.27
2007-04-23TheJudgerv4_computers814DB0D6060BA08312.27


PRP results:
No PRP results for M19253497


CERT results:
No CERT results for M19253497


P-1 factor-bounds graph:
B1 = 230000, B2 = 5635000 (P-1 stage 2)
B1 = 230000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
269
268
267
266
259
258
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
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260
270
280
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Last modified: 2024-02-29T14:28:04+00:00