« 8/23の有吉のダレトクは、千葉・南房総のキモうまグルメ&そうめんレシピ&ヒャダインの甘酒かた焼きそばでした。 | トップページ | 「微笑む人」(貫井徳郎)を読んだ。これは怖い、、、 »

2016年8月23日 (火)

10^6400-10^6352-1は素数、で9だらけの中に一個だけ8がある。

Cliff PickoverさんのTweetで知った話題。

ここはPari/GPで計算してみよう。
factor(10^6400-10^6352-1)=

Mat([99999999999999999999999999999999999999999999999899999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

999999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

9999999999999999999999999999999999999999999999999999999999999999999999999

99999999999999999999999999999999999999999999999999999999999999999

, 1])

ほんとだ!では8がどこにあるか、間違い探し、、、

« 8/23の有吉のダレトクは、千葉・南房総のキモうまグルメ&そうめんレシピ&ヒャダインの甘酒かた焼きそばでした。 | トップページ | 「微笑む人」(貫井徳郎)を読んだ。これは怖い、、、 »

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« 8/23の有吉のダレトクは、千葉・南房総のキモうまグルメ&そうめんレシピ&ヒャダインの甘酒かた焼きそばでした。 | トップページ | 「微笑む人」(貫井徳郎)を読んだ。これは怖い、、、 »

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