Two a penny

.A French software engineer said on Friday he was claiming a world record for calculating Pi, the constant that has fascinated mathematicians for millennia.
Fabrice Bellard said he used an inexpensive desktop computer – and not a supercomputer used in past records – to calculate Pi to close toly 2.
That is around 123 billion digits more than the previous record set last August by Japanese professor Daisuke Takahashi, he said.7 trillion decimal places.577 billion digits.
Professor Takahashi, using a T2K Open Supercomputer, took 29 hours to crunch Pi to 2.
The gear cost “a bit less than 2,000 euros” ($3,123), Mr Bellard, who earns a living as a software consultant in digital television in Paris, said in an email exchange.
Mr Bellard took 131 days, comprising 103 for the computation in binary digits, 13 days for verification, 12 days to convert the binary digits to a base of 10 and three final days to check the conversion. The only unusual thing is that it has five 1.
“It is a completely standard PC. Mainstream PCs generally have only one 1-teraoctet disk.5-teraoctet hard disks.
Extracts of the 2,699,999,990,000-digit outcome have been published so that they can be compared to preceding records in order to gain independent verification, Mr Bellard said.”
Bellard has placed on his website details of the achievement, including the use of a high-powered mathematical engine called the Chudnovsky algorithm that chewed through the computation. .
Files containing the digits are also being offered to any outside organisation keen on hosting the record, he said..14159. in a string whose digits are believed never to repeat or end..
“Optimising these algorithms to get good performance is a difficult programming challenge,” he said.
Bellard said he was “not especially interested” in Pi’s digits but more in taking up the gauntlet of writing the software to carry out the arithmetic.
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.France has deported to Egypt a radical imam who for months had been inciting followers in Paris area mosques to rise up against the West, the government said.
Described as dangerous, Ali Ibrahim Al-Sudani was detained and sent back to Egypt under an emergency deportation order, Interior Minister Brice Hortefeux said in a statement. .
The Egyptian national was the 29th imam or Islamic preacher to have been deported from France since 2001, according to the interior ministry.
Mr Sudani, aged around 27, showed “contempt for our society’s values and incited violence,” he added.
French security agencies had been tracking Sudani since 2008 and found his Jihadist teachings to be “quite hardline,” said an official close to the case.
In all, 129 Islamic radicals have been expelled from French territory, it added.
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