Around 2013 I finished my psp2 hobby project and published the result on janfeitsma.nl. Since then, Will Galway has been serving the database on his University's web page.
This reposity is the new location. The domain janfeitsma.nl will go offline soon due to being relatively costly. Furthermore, this repo approach allows for better collaboration, should anyone want to contribute changes.
Data can be found here. This is basically the largest of the variants provided by Will. The smaller ones can be trivially derived from this.
File name: annotated-psps-below-2-to-64.txt.bz2 (about 2GB!).
Md5sum: 52d806c31ca69df2320bda09867161dc
It lists both the pseudoprimes and their prime factorizations, with additional annotations:
- Column 1: "C" if the pseudoprime is a Carmichael number, blank otherwise.
- Column 2: "S" if the pseudoprime is a strong pseudoprime, blank otherwise.
The first 10 lines read:
341 11 31
C 561 3 11 17
645 3 5 43
C 1105 5 13 17
1387 19 73
C 1729 7 13 19
1905 3 5 127
S 2047 23 89
C 2465 5 17 29
2701 37 73
Old html files can be found here: mirror_janfeitsma.nl.
(If someone wants to help making this nicer / readable, a pull request is always welcome!)
Placeholder for relevant discussions / threads on MersenneForum / etc.