def main():
for x in range(10000, 0, -1):
for y in range(9, 0, -1):
L = range(1, y+1)
cp = gmath.concatenated_product(x, L)
if gmath.is_pandigital(cp) and len(str(cp)) == 9:
return cp
def main():
result = []
for x in range(1, 60):
for y in range(1, 2000):
p = x*y
z = str(x) + str(y) + str(p)
if gmath.is_pandigital(z) and len(z) == 9 and p not in result:
result.append(p)
return sum(result)
def main():
for n in range(7654321, 1, -2):
if gmath.is_pandigital(n) and gmath.is_prime(n):
return n
return None
