* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
761 B
761 B
id, title, challengeType, videoUrl, dashedName
id | title | challengeType | videoUrl | dashedName |
---|---|---|---|---|
5900f4451000cf542c50ff57 | 问题216:调查2n2-1形式的数字的素数 | 5 | problem-216-investigating-the-primality-of-numbers-of-the-form-2n2-1 |
--description--
考虑形式为t(n)= 2n2-1的数字t(n),其中n> 1.第一个这样的数字是7,17,31,49,71,97,127和161.事实证明只有49 = 7 * 7和161 = 7 * 23不是素数。对于n≤10000,有2202个数字t(n)是素数。
对于n≤50,000,000,有多少个数t(n)是素数?
--hints--
euler216()
应该返回5437849。
assert.strictEqual(euler216(), 5437849);
--seed--
--seed-contents--
function euler216() {
return true;
}
euler216();
--solutions--
// solution required