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
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
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
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.
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.
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.
