42 lines
744 B
Markdown
42 lines
744 B
Markdown
---
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id: 5900f4291000cf542c50ff3a
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title: 'Problem 187: Semiprimes'
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challengeType: 5
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forumTopicId: 301823
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---
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# --description--
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A composite is a number containing at least two prime factors. For example, 15 = 3 × 5; 9 = 3 × 3; 12 = 2 × 2 × 3.
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There are ten composites below thirty containing precisely two, not necessarily distinct, prime factors: 4, 6, 9, 10, 14, 15, 21, 22, 25, 26.
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How many composite integers, n < 108, have precisely two, not necessarily distinct, prime factors?
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# --hints--
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`euler187()` should return 17427258.
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```js
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assert.strictEqual(euler187(), 17427258);
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```
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# --seed--
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## --seed-contents--
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```js
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function euler187() {
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return true;
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}
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euler187();
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```
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# --solutions--
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```js
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// solution required
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```
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