Английская Википедия:269 (number)

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Шаблон:Cleanup Шаблон:Infobox number 269 (two hundred [and] sixty-nine) is the natural number between 268 and 270. It is also a prime number.

In mathematics

269 is a twin prime,[1] and a Ramanujan prime.[2] It is the largest prime factor of 9! + 1 = 362881,[3] and the smallest natural number that cannot be represented as the determinant of a 10 × 10 (0,1)-matrix.[4]

References

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Шаблон:Num-stub