Primo record

Phi(13680,26371)
13082397832081
15267 decimal digits

The certification of this number was done by Tom Wu with Primo 4.0.0 (alpha 10) in 78 days. Processor used: AMD Phenom II 1090T.


20 greatest numbers certified with Primo
Factor of Phi(13680,26371)
15267 decimal digits
 Certified by Tom Wu (US, 2012) [more...]
Certificate: ecpp15267.zip (9.5 MiB)
Phi(3243,-2399401) ÷ 33320592661
12903 decimal digits
 Certified by Tom Wu (US, 2010) [more...]
Certificate: ecpp12903.zip (8.2 MiB)
Factor of Phi(5655,34120)
12155 decimal digits
 Certified by Tom Wu (US, 2011) [more...]
Certificate: ecpp12155.zip (7.0 MiB)
238090 + 47269
11467 decimal digits
 Certified by Norman Luhn (EU, 2010)
Certificate: ecpp11467.zip (7.4 MiB)
811889 + 118898
10737 decimal digits
 Certified by Andrey Kulsha (Belarus, 2012)
Certificate: ecpp10737.zip (6.5 MiB)
Factor of 245363571*2^35426 - 3
10630 decimal digits
 Certified by Tom Wu (US, 2012) [more...]
Certificate: ecpp10630.zip (5.4 MiB)
Phi(561,43669) ÷ 361212114583
10472 decimal digits
 Certified by Andy Steward (EU, 2011) [more...]
Certificate: ecpp10472.zip (6.2 MiB)
234653 + 346532
10432 decimal digits
 Certified by Andrey Kulsha (Belarus, 2011)
Certificate: ecpp10432.zip (5.0 MiB)
Factor of Phi(4641,32556)
10378 decimal digits
 Certified by Tom Wu (US, 2011) [more...]
Certificate: ecpp10378.zip (5.2 MiB)
(19*1010296 - 1) ÷ 9
10297 decimal digits
 Certified by Markus Tervooren (EU, 2012)
Certificate: ecpp10297.zip (5.0 MiB)
p(82352631)
10101 decimal digits
 Certified by Predrag Minovic and Larry Soule (Serbia/US, 2012) [more...]
Certificate: ecpp10101.zip (4.5 MiB)
233548 + 4471
10099 decimal digits
 Certified by Norman Luhn (EU, 2009)
Certificate: ecpp10099.zip (5.3 MiB)
2*1010000 + 48870...62199
10001 decimal digits
 Certified by Laurent Théry (EU, 2011)
Certificate: ecpp10001.zip (5.0 MiB)
1524583 - 1514583
10000 decimal digits
 Certified by Mike Oakes (EU, 2010)
Certificate: ecpp10000.zip (5.5 MiB)
711796 + 117967
9969 decimal digits
 Certified by Andrey Kulsha (Belarus, 2011)
Certificate: ecpp9969.zip (5.7 MiB)
p(80036992)
9958 decimal digits
 Certified by Bernardo Boncompagni (EU, 2011) [more...]
Certificate: ecpp9958.zip (4.3 MiB)
(8*109812 + 1) ÷ 9
9812 decimal digits
 Certified by Markus Tervooren (EU, 2011)
Certificate: ecpp9812.zip (4.3 MiB)
231544 + 19081
9496 decimal digits
 Certified by Engracio Esmenda (US, 2010)
Certificate: ecpp9496.zip (5.3 MiB)
p(67230446)
9126 decimal digits
 Certified by Predrag Minovic and Larry Soule (Serbia/US, 2011) [more...]
Certificate: ecpp9126.zip (3.8 MiB)
229727 + 20273
8949 decimal digits
 Certified by Norman Luhn (EU, 2009)
Certificate: ecpp8949.zip (4.3 MiB)


ECPP records set with Primo
(32 × 106959 - 23) ÷ 99
6959 decimal digits
 Certified by Hans Rosenthal (EU, 2003).
Certificate: ecpp6959.zip (4.3 MiB)
16282536 ... 36478311
5878 decimal digits
 Certified by Jose Luis Gomez Pardo (EU, 2003).
Certificate: ecpp5878b.zip (3.1 MiB)
105019 + 43157099231631693
5020 decimal digits
 Certified by Giovanni and Marco La Barbera (EU, 2001).
Certificate: ecpp5020.zip (2.1 MiB)
103999 + 4771
4000 decimal digits
 Certified by Giovanni and Marco La Barbera (EU, 2001).
Certificate: ecpp4000.zip (1.3 MiB)
(3481223 - 1) ÷ 347
3106 decimal digits
 Certified by Giovanni and Marco La Barbera (EU, 2001).
(301789 - 1) ÷ 29
2642 decimal digits
 Certified by Giovanni and Marco La Barbera (EU, 2000).

Since 2003, 64-bit distributed versions of ECPP have established new records (notice that, up to now, these programs have never been released by their respective authors).


Other primes

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