#1
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¼ÅÃÇÁ¢Í§àŢⴴ
¨§ËÒ¼ÅÃÇÁ¢Í§àŢⴴ $4444^{4444}$
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#2
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¤×Í ¼ÁÍèÒ¹¨Ò¡ PUTNAM ÁÒ¤ÃѺ (ÂѧäÁè¤èÍÂà¢éÒã¨à¾ÃÒÐàà¤è¤ÅéÒÂæ¡Ñ¹)
¶éÒãËé $f(n)$ àà·¹¼ÅÃÇÁ¢Í§àŢⴴ·Ñé§ËÁ´¢Í§ $n$ ¨Ðä´éÇèÒ $1\cdot (1+n\log n)\le f(n)\le 9\cdot (1+n\log n)$ à¾ÃÒЩйÑé¹ $16,000<f(4444^{4444})<160,000$ ààÅÐãªé $n\equiv f(n)\pmod {99999}$ $$4444^{4444}\equiv(4444^{2})^{2222}\equiv (49333)^{2222}\equiv 52252\pmod {99999}$$ «Ö觨ӹǹàµçÁÁÕ $2$ ¨Ó¹Ç¹·ÕèÊÍ´¤Åéͧ ¤×Í $99999\pm52252=47747,152251$ «Ö觼ÁÇèÒ¹èҨР$152,251$ à¾ÃÒШҡ PUTNAM $f(f(f(n)))=7$
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#3
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$S(S(S...S(4444^{4444})...))=7$
$4444\equiv 7\,\,\,(mod9)$ $4444^{4444}\equiv 7\,\,(mod9)$ $S(4444^{4444})=[(4444+3)\times 9]+7$ $\quad\quad\quad=40030$ äÁè·ÃÒº¤ÓµÍºµÃ§¡Ñºà©ÅÂÁÑê ¶éÒäÁèµÃ§¡çÅ×ÁÁѹä»àŤÃѺ áµè¶éҵç¤èÍÂÁÒ͸ԺÒÂà¾ÔèÁ ÇÔ¸Õ¹Õé¼Ô´áÅéÇÅèФÃѺ´ÙàËÁ×͹¤èÒ·Õèä´é¨ÃÔ§ÁÒ¡¡ÇèÒ¹Õéà¡×ͺà·èÒµÑÇ ·Õè¶Ù¡¤§à»ç¹72601 04 ÁÕ¹Ò¤Á 2012 21:20 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ artty60 |
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