Wieferich primes: Difference between revisions
Wieferich primes in various BASIC dialents (BASIC256, PureBasic, Run BASIC and Yabasic)
(Wieferich primes in Python) |
(Wieferich primes in various BASIC dialents (BASIC256, PureBasic, Run BASIC and Yabasic)) |
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Wieferich primes 1-4999: 2
</pre>
=={{header|BASIC}}==
==={{header|BASIC256}}===
{{trans|FreeBASIC}}
<lang freebasic>print "Wieferich primes less than 5000: "
for i = 1 to 5000
if isWeiferich(i) then print i
next i
end
function isWeiferich(p)
if not isPrime(p) then return False
q = 1
p2 = p ^ 2
while p > 1
q = (2 * q) mod p2
p -= 1
end while
if q = 1 then return True else return False
end function
function isPrime(v)
if v < 2 then return False
if v mod 2 = 0 then return v = 2
if v mod 3 = 0 then return v = 3
d = 5
while d * d <= v
if v mod d = 0 then return False else d += 2
end while
return True
end function</lang>
{{out}}
<pre>Igual que la entrada de FreeBASIC.</pre>
==={{header|PureBasic}}===
{{trans|FreeBASIC}}
<lang PureBasic>Procedure.i isPrime(n)
Protected k
If n = 2 : ProcedureReturn #True
ElseIf n <= 1 Or n % 2 = 0 : ProcedureReturn #False
Else
For k = 3 To Int(Sqr(n)) Step 2
If n % k = 0
ProcedureReturn #False
EndIf
Next
EndIf
ProcedureReturn #True
EndProcedure
Procedure.i isWeiferich(p)
Protected q, p2
If Not isPrime(p) : ProcedureReturn #False : EndIf
q = 1
p2 = Pow(p, 2)
While p > 1
q = (2*q) % p2
p - 1
Wend
If q = 1
ProcedureReturn #True
Else
ProcedureReturn #False
EndIf
EndProcedure
OpenConsole()
PrintN("Wieferich primes less than 5000: ")
For i = 2 To 5000
If isWeiferich(i)
PrintN(Str(i))
EndIf
Next i
Input()
CloseConsole()</lang>
{{out}}
<pre>Igual que la entrada de FreeBASIC.</pre>
==={{header|Run BASIC}}===
<lang runbasic>print "Wieferich primes less than 5000: "
for i = 1 to 5000
if isWeiferich(i) then print i
next i
end
function isPrime(n)
if n < 2 then isPrime = 0 : goto [exit]
if n = 2 then isPrime = 1 : goto [exit]
if n mod 2 = 0 then isPrime = 0 : goto [exit]
isPrime = 1
for i = 3 to int(n^.5) step 2
if n mod i = 0 then isPrime = 0 : goto [exit]
next i
[exit]
end function
function isWeiferich(p)
if isPrime(p) = 0 then isWeiferich = 0 : goto [exit]
q = 1
p2 = p^2
while p > 1
q = (2*q) mod p2
p = p - 1
wend
if q = 1 then
isWeiferich = 1 : goto [exit]
else
isWeiferich = 0 : goto [exit]
end if
[exit]
end function</lang>
{{out}}
<pre>Igual que la entrada de FreeBASIC.</pre>
==={{header|Yabasic}}===
{{trans|FreeBASIC}}
<lang yabasic>print "Wieferich primes less than 5000: "
for i = 2 to 5000
if isWeiferich(i) print i
next i
end
sub isWeiferich(p)
if not isPrime(p) return False
q = 1
p2 = p ^ 2
while p > 1
q = mod((2*q), p2)
p = p - 1
wend
if q = 1 then return True else return False : fi
end sub
sub isPrime(v)
if v < 2 return False
if mod(v, 2) = 0 return v = 2
if mod(v, 3) = 0 return v = 3
d = 5
while d * d <= v
if mod(v, d) = 0 then return False else d = d + 2 : fi
wend
return True
end sub</lang>
{{out}}
<pre>Igual que la entrada de FreeBASIC.</pre>
=={{header|C}}==
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