is 2 1999 - 1
has 602 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26714,864.391083.5821 %10000000001000000000000.220215.0585 %14,864.611286.0544 %
Target2440.001275.0000 %500500000.00000.7602 %0.001275.1900 %
Difference+23+14,864.3898+8.5821 %+999999500+99999950000+0.2202+14.2983%+14,864.6100+10.8643 %

Known prime factors (7 factors, 1,999.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19991807097720.785452
22 × 113
-41137.672e-113.423e-104.074e-10
19996313886878400187271192169.097157926135027518441
11083 × 18143 × 785393989
-1814378539398988,2180.00150.0028
1999632524530252645981019953532685.70915821023768200249650324
22 × 7 × 132 × 3343411616272242107
-16933434116162722421076.961e+96,273,07611,716,359
1999534716224901897210961920006361025734112.0421337459291900693374091845938872
23 × 23 × 7268800499460290076586119233
-2372688004994602900765861192339.489e+131.364e+162.547e+16
1999183592578536724079940443624992251400398340130.432459211051867744071887052588775016009
30932789 × 315315053 × 47081311089430392377
-315315053470813110894303923778.945e+1388,336,310164,987,627
1999745201829672932908258808505010187701436403930028749162.3501863936542453559050172107316183561034108063857
33 × 3457 × 11883983 × 9097858260061 × 184699955461732237201
2020-09-0290978582600611846999554617322372018.881e+13346,543,588647,246,363
1999
click to show decimal representation
4281,418.5842020-09-02

57 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-09-07kkmrkkblmbrbkManual testing100000000010000000000012
skipped known factor: 1807097
skipped known factor: 631388687840018727119
---44.730%


Trial Factoring results:
5758596061626364656667
No TF results for M1999


ECM factoring results:
Total ECM effort:499.288 GHz-days
Estimated T-Level:50.998
DigitsB1CompleteFacMiss
20110007,624.0000.000%
25500002,851.0230.000%
30250000895.7430.000%
351000000215.3780.000%
40300000045.0140.000%
45110000008.2870.025%
50440000001.34726.002%
551100000000.20081.898%
602600000000.02797.353%
658000000000.00399.669%


ECM Summary

B1B2factorcurvesGHz-days
1100000011000000002,50012.41
44000000440000000020,814451.6
11000000011000000000703.475
26000000026000000000505.866
85000000015892628251516125.90


Lucas-Lehmer results:
No L-L results for M1999


PRP results:
dateuseridcompidcofactorsres64
2017-09-21Oliver KruseOliver-PC30D88AA8604091__
2017-10-02kkmrkkblmbrbkManual testing
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
30D88AA860409147
2017-12-07ATHManual testing
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
30D88AA860409147
2020-04-17Oliver KruseIOS-1
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
8CB9209D417BFF03
2020-08-12_p95holder_TFL16_PRPt11-E_b
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
8CB9209D417BFF03
2020-09-04atrenchDesktop
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
7452018296729329082588085050101877014364039300287
Probable Prime!
2020-09-04atrenchDesktop
1807097
631388687840018727119
63252453025264598101995353
5347162249018972109619200063610257
1835925785367240799404436249922514003983
7452018296729329082588085050101877014364039300287
Probable Prime!


CERT results:
No CERT results for M1999


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 100000000000 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=51 ~= 153-bit
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Last modified: 2024-03-13T02:15:48+00:00