1.2 KiB
1.2 KiB
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5900f4351000cf542c50ff47 | Problem 200: Find the 200th prime-proof sqube containing the contiguous sub-string "200" | 5 | 301840 | problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200 |
--description--
We shall define a sqube to be a number of the form, {p^2}{q^3}
, where p
and q
are distinct primes.
For example, 200 = {5^2}{2^3}
or 120072949 = {{23}^2}{{61}^3}
.
The first five squbes are 72, 108, 200, 392, and 500.
Interestingly, 200 is also the first number for which you cannot change any single digit to make a prime; we shall call such numbers, prime-proof. The next prime-proof sqube which contains the contiguous sub-string 200
is 1992008.
Find the 200th prime-proof sqube containing the contiguous sub-string 200
.
--hints--
primeProofSqubeWithSubString()
should return 229161792008
.
assert.strictEqual(primeProofSqubeWithSubString(), 229161792008);
--seed--
--seed-contents--
function primeProofSqubeWithSubString() {
return true;
}
primeProofSqubeWithSubString();
--solutions--
// solution required