Full description
The extra data for PARI consists of:
* elldata is PARI/GP version of J. E. Cremona Elliptic Curve Data,
needed by ellsearch and ellidentify.
* galdata is needed by polgalois to compute Galois group in degrees
8 through 11.
* seadata is needed by ellap for large primes.
* nftables is a repackaging of the historical megrez number field
tables (errors fixed, 1/10th the size, easier to use).