Category talk:Wren-long: Difference between revisions
→Source code: Added largestPrime and prevPrime methods to ULong class.
(→Source code: Removed some redundant lines.) |
(→Source code: Added largestPrime and prevPrime methods to ULong class.) |
||
Line 78:
// Returns the largest ULong = 2^64-1 = 18446744073709551615
static largest { lohi_(4294967295, 4294967295) }
// Returns the largest prime less than 2^64.
static largestPrime { ULong.new("18446744073709551557") }
// Returns the smallest ULong = 0
Line 486 ⟶ 489:
if (n.isPrime) return n
n = n + ULong.two
}
}
// Returns the previous prime number less than the current instance or null if there isn't one.
prevPrime {
if (this < ULong.three) return null
if (this == ULong.three) return ULong.two
var n = isEven ? this - ULong.one : this - ULong.two
while (true) {
if (n.isPrime) return n
n = n - ULong.two
}
}
| |||