is 2 19253623 - 1
has 5795919 decimal digits
takes 12.274 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6F9F933C594B4AB5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27399.349865.7534 %23000041400000.40952.5440 %99.759466.6246 %
Target2696.200763.7681 %140000200000001.12963.6084 %7.330465.0755 %
Difference+4+93.1491+1.9853 %+90000-15860000-0.7201-1.0644 %+92.4290+1.5491 %

Known prime factors:
No known factors for M19253623

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-06-01ANONYMOUSv4_computers2300004140000--0.4103.911%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-27Net_Forcev4_computers212580.002
2002-02-10Net_Forcev4_computers212590.002
2002-05-11Team Prime Ribv4_computers212660.388
2014-06-15NesowaManual testing2662682.329
2017-11-22ramgeisManual testing2682693.105
2019-12-27lycornManual testing2692706.210
2021-09-12SRBaseManual testing27027112.42
2021-10-01ANONYMOUSManual testing27127224.84
2021-11-26ANONYMOUSManual testing27227349.68


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)
2003-08-08ANONYMOUSv4_computers6F9F933C594B4AB512.27
2007-04-23TheJudgerv4_computers6F9F933C594B4AB512.27


PRP results:
No PRP results for M19253623


CERT results:
No CERT results for M19253623


P-1 factor-bounds graph:
B1 = 230000, B2 = 4140000 (P-1 stage 2)
B1 = 230000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
273
272
271
270
269
268
266
259
258
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00