prime, lprime

prime(index)

lprime(index)

:: Returns a prime number.

return

integer

index

integer

• The two functions, prime() and lprime(), returns an element stored in the system table of prime numbers. Here, index is a non-negative integer and be used as an index for the prime tables. The function prime() can return one of 1900 primes up to 16381 indexed so that the smaller one has smaller index. The function lprime() can return one of 999 primes which are 8 digit sized and indexed so that the larger one has the smaller index. The two function always returns 0 for other indices.
• For more general function for prime generation, there is a PARI function pari(nextprime,number).

[95] prime(0);
2
[96] prime(1228);
9973
[97] lprime(0);
99999989
[98] lprime(999);
0

References

section pari.

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