Exemple #1
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def the_primes():
    from primes import find_next_prime
    next_prime = find_next_prime(2 * (10 ** 9))
    while next_prime < 2*(10 ** 9) + 2000:
        yield next_prime
        next_prime = find_next_prime(next_prime+1)
Exemple #2
0
                bstr = bstr[1:]
            index = index + d
        indices.append(index)
    return indices

def addGroup(p):
    group_size = 0
    best = ''
    ps = str(p)
    count = Counter(ps)
    for c, v in count.most_common():
        if v < 2:
            break
        indices = createIndices(ps, c, v)
        for index in indices:
            p_map.setdefault(index, []).append(p)
            if len(p_map[index]) > group_size:
                group_size = len(p_map[index])
                best = index
    return best

if __name__ == '__main__':
    n = 0
    for _ in count(0):
        n = find_next_prime(n+1)
        group = addGroup(n)
        if group and len(p_map[group]) == 8:
            print "{}".format(sorted(p_map[group])[0])
            break

Exemple #3
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def try_prime_test(possible_set):
    ps = list(possible_set)
    for i in range(len(ps)):
        for j in range(i+1, len(ps)):
            if not try_prime_pair(ps[i], ps[j]):
                return False
    return True

def add_new_primes(new, old):
    if frozenset(new) in old:
        return
    new_sets = [frozenset(new)]
    for prime_set in old:
        possible_set = prime_set.union(new)
        if possible_set not in old and possible_set not in new_sets and try_prime_test(possible_set):
            new_sets.append(possible_set)
            if len(possible_set) == 5:
                print sum(possible_set)
                sys.exit(0)
    old.update(new_sets)

if __name__ == '__main__':
    prime_sets = set()
    current_prime = 10
    while True:
        current_prime = primes.find_next_prime(current_prime + 1)
        new_primes = split_prime(current_prime)
        if new_primes:
            add_new_primes(new_primes, prime_sets)