Zsigmondy numbers: Difference between revisions
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=={{header|EasyLang}}==
{{trans|Phix}}
<syntaxhighlight>
func isprim num .
if num < 2
return 0
.
i = 2
while i <= sqrt num
if num mod i = 0
return 0
.
i += 1
.
return 1
.
proc sort . d[] .
for i = 1 to len d[] - 1
for j = i + 1 to len d[]
if d[j] < d[i]
swap d[j] d[i]
.
.
.
.
proc divisors num . res[] .
res[] = [ ]
d = 1
while d <= sqrt num
if num mod d = 0
res[] &= d
if d <> sqrt num
res[] &= num / d
.
.
d += 1
.
sort res[]
.
func gcd a b .
while b <> 0
h = b
b = a mod b
a = h
.
return a
.
func zsigmo n a b .
dn = pow a n - pow b n
if isprim dn = 1
return dn
.
divisors dn divs[]
for m = 1 to n - 1
dms[] &= pow a m - pow b m
.
for i = len divs[] downto 1
d = divs[i]
for m = 1 to n - 1
if gcd dms[m] d <> 1
break 1
.
.
if m = n
return d
.
.
return 1
.
proc test . .
test[][] = [ [ 2 1 ] [ 3 1 ] [ 4 1 ] [ 5 1 ] [ 6 1 ] [ 7 1 ] [ 3 2 ] [ 5 3 ] [ 7 3 ] [ 7 5 ] ]
for i to len test[][]
a = test[i][1]
b = test[i][2]
write "Zsigmondy(n, " & a & ", " & b & "):"
for n = 1 to 10
write " " & zsigmo n a b
.
print ""
.
.
test
</syntaxhighlight>
=={{header|J}}==
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