is 2 19189693 - 1
has 5776674 decimal digits
takes 12.233 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L90348C075FA06A33double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2696.221463.7681%23000056350000.48484.1698%6.706265.2789%1.5108%
PrimeNet2650.380261.5385%9000028000000.21974.8391%0.599963.3997%1.8612%
GPU722696.221463.7681%14000040000000.32383.6067%6.545265.0749%1.3068%
Difference---+90000+1635000+0.1610+0.5631%+0.1610+0.2040%+0.2040%

Known prime factors (1 factor, 81.2 bits, 0.00042328% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1918969328271587057243432261801512581.22673663468866446775
3 × 52 × 89413 × 10984751489
2019-09-15894131098475148930,244553.301,033.3

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-05-26T00:00:00zarfv4_computers2300005635000---0.485--4.170%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-27T00:00:00Net_Forcev4_computers21258--0.002--
2002-01-15T00:00:00Net_Forcev4_computers21259--0.004--
2002-04-20T00:00:00ANONYMOUSv4_computers21264--0.185--
2002-04-28T00:00:00ANONYMOUSv4_computers21266--0.770--
2014-07-06T00:26:00NesowaManual testing266267--0.779--
2014-07-06T00:26:00NesowaManual testing267268--1.558--
2017-11-30T10:52:49ramgeisManual testing268269--3.115--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.969 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.969 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.969


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-06-17T00:00:00zarfv4_computers90348C075FA06A3312.23
2007-04-23T00:00:00WWU-CSv4_computers90348C075FA06A3312.23


PRP results:
No PRP results for M19189693


P-1 factor-bounds graph:
B1 = 230000, B2 = 5635000 (P-1 stage 2)
B1 = 230000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
269
268
267
266
264
259
258
250
260
270
280
290
2100
Last modified: 2019-09-15T08:50:28+00:00