is 2 19479833 - 1
has 5864015 decimal digits
takes 12.418 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L69906C18547A7495double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27398.196165.7534 %80000080220231041.10017.4132 %139.296368.2922 %
Target2696.128763.7681 %140000200000001.12963.6143 %7.258365.0776 %
Difference+4+92.0674+1.9853 %+660000+782202310+39.9705+3.7989%+132.0379+3.2145 %

Known prime factors (1 factor, 74.3 bits, 0.00038163% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19479833239196966116588688626712374.341613960515258495
3 × 5 × 173059 × 236512987
2022-04-04173059236512987311.8212.06322.247

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2006-09-04James Heinrichv4_computers11000021450006--0.2043.029%
2022-04-04Seth_TrManual testing80000080220231022374.34152.2910.301%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-20ANONYMOUSv4_computers212580.002
2001-11-03Net_Forcev4_computers212580.002
2002-03-24Net_Forcev4_computers212590.002
2002-07-06tscv4_computers212660.384
2014-04-21NesowaManual testing2662682.302
2017-11-24ramgeisManual testing2682693.069
2019-12-08lycornManual testing2692706.138
2021-09-13SRBaseManual testing27027112.28
2021-10-01ANONYMOUSManual testing27127224.55
2021-10-31ANONYMOUSManual testing27227349.10


ECM factoring results:
No ECM results for M19479833


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-10-08curtiscv4_computers69906C18547A749512.42
2007-07-04TheJudgerv4_computers69906C18547A749512.42


PRP results:
No PRP results for M19479833


CERT results:
No CERT results for M19479833


P-1 factor-bounds graph:
B1 = 800000, B2 = 802202310 (P-1 stage 2)
B1 = 800000 (P-1 stage 1)
B1 = 110000, B2 = 2145000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
104
105
106
104
105
106
107
108
109
TF factor-bounds graph:
273
272
271
270
269
268
266
259
258
this exponent TF target: 69
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00