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ECPP records set with Primo

(1049081 - 1)/9
49081 decimal digits

Certified with Primo 4.3.3 by Paul Underwood (UK, 2022) [more...]
The certification process took 20 months using an AMD Ryzen Threadripper 3990X, 64 cores.

Certificate:

Partition(1289844341)
40000 decimal digits

Certified by Paul Underwood (UK, 2020) [more...].

Certificate:

2116224 - 15905
34987 decimal digits

Certified by Peter Kaiser (EU, 2017) [more...].

Certificate:

Picture(57885161)
34093 decimal digits

Certified by Paul Underwood (EU, 2016) [more...].

Certificate:

Lucas(148091)
30950 decimal digits

Certified by Paul Underwood (EU, 2015) [more...].

Certificate:

Lehmer-Ramanujan(331,2129)
29492 decimal digits

Certified by Philippe Alsina, Pierre Gazzano, Nik Lygeros, Olivier Rozier and André Solaris (EU, 2015).

Certificate:

Lucas(140057)
29271 decimal digits

Certified by Peter Kaiser and Paul Underwood (EU, 2014) [more...].

Certificate:

(32 × 106959 - 23)/99
6959 decimal digits

Certified by Hans Rosenthal (EU, 2003).

Certificate: ecpp6959.zip (4.3 MB)

16282536 .. 36478311
5878 decimal digits

Certified by Jose Luis Gomez Pardo (EU, 2003).

Certificate: ecpp5878b.zip (3.1 MB)

105019 + 43157099231631693
5020 decimal digits

Certified by Giovanni and Marco La Barbera (EU, 2001).

Certificate: ecpp5020.zip (2.1 MB)

103999 + 4771
4000 decimal digits

Certified by Giovanni and Marco La Barbera (EU, 2001).

Certificate: ecpp4000.zip (1.3 MB)

(3481223 - 1)/347
3106 decimal digits

Certified by Giovanni and Marco La Barbera (EU, 2001).



Other primes

Links to some pages reporting primes certified with Primo: