On l lth September 2013, the Inner Mongolia Mineral Resources and Reserves Evaluation Center estimated that the world＇s third-largest molybdenum deposit had been found in the Caosiyao area of Xinghe County, Inner Mon...On l lth September 2013, the Inner Mongolia Mineral Resources and Reserves Evaluation Center estimated that the world＇s third-largest molybdenum deposit had been found in the Caosiyao area of Xinghe County, Inner Mongolia, NE China. The find has 130235.60×10^4 t of （122b）＋（333） molybdenum ores, a metal amount of 1327649.27 t, with Mo grade of 0.102-a super-large one.展开更多
A system error that struck at midnight on January 20 proved a gold mine for several users of Pinduoduo (PDD), China's third-largest e-commerce platform: The glitch allowed an unlimited number of 100 RMB 44red pack...A system error that struck at midnight on January 20 proved a gold mine for several users of Pinduoduo (PDD), China's third-largest e-commerce platform: The glitch allowed an unlimited number of 100 RMB 44red packet" coupons to be sold at the bargain price 0.4 RMB each.展开更多
Define the total number of distinct prime factors of an odd perfect number n asω(n). We prove that if n is an odd perfect number which is relatively prime to 3 and 5 and7, then ω(n) ≥ 107. And using this result, we...Define the total number of distinct prime factors of an odd perfect number n asω(n). We prove that if n is an odd perfect number which is relatively prime to 3 and 5 and7, then ω(n) ≥ 107. And using this result, we give a conclusion that the third largest prime factor of such an odd perfect number exceeds 1283.展开更多
文摘On l lth September 2013, the Inner Mongolia Mineral Resources and Reserves Evaluation Center estimated that the world＇s third-largest molybdenum deposit had been found in the Caosiyao area of Xinghe County, Inner Mongolia, NE China. The find has 130235.60×10^4 t of （122b）＋（333） molybdenum ores, a metal amount of 1327649.27 t, with Mo grade of 0.102-a super-large one.
文摘A system error that struck at midnight on January 20 proved a gold mine for several users of Pinduoduo (PDD), China's third-largest e-commerce platform: The glitch allowed an unlimited number of 100 RMB 44red packet" coupons to be sold at the bargain price 0.4 RMB each.
基金Foundation item： Supported by the Science Foundation of Kashgar Teacher＇s College（112390）
文摘Define the total number of distinct prime factors of an odd perfect number n asω(n). We prove that if n is an odd perfect number which is relatively prime to 3 and 5 and7, then ω(n) ≥ 107. And using this result, we give a conclusion that the third largest prime factor of such an odd perfect number exceeds 1283.
