Going Postal
MENU
  • Home ►
    • Contact
    • Privacy Policy
    • Blog
  • Politics ►
    • Authoritarianism
    • Capitalism
    • Communism
    • Conservatives
    • Elections
    • European Union
    • Labour
    • Peace
    • Socialism
    • Terrorism
    • War
    • US
  • Economics ►
    • Business
    • Finance
    • Trading
  • Science ►
    • Engineering
    • Geology
    • Health
    • Physics
    • Mathematics
    • Space
    • Technology
  • History ►
    • English Civil War
    • 18th Century
    • 19th Century
    • 20th Century
    • WW I
    • WW II
    • The Cold War
  • Literature ►
    • Biography
    • Book Reviews
    • Fiction
    • Mystery
    • Poetry
    • Satire
    • Thriller
  • Forums ►
    • Campaigning
    • Competitions
    • Culture
    • Current Affairs
    • Elections
    • GP Events
    • Media Shows & Appearances
    • Publishing
    • Welcome
  • Merchandise ►
    • Trump Mugs and Tee Shirts
    • Custom Mug
    • GP Mugs
    • GP Coasters
    • GP Books
    • GP Keyrings
  • Home
    • Contact
    • Privacy Policy
    • Blog
  • Politics
    • Authoritarianism
    • Capitalism
    • Communism
    • Conservatives
    • Elections
    • European Union
    • Labour
    • Peace
    • Socialism
    • Terrorism
    • War
    • US
  • Economics
    • Business
    • Finance
    • Trading
  • Science
    • Engineering
    • Geology
    • Health
    • Physics
    • Mathematics
    • Space
    • Technology
  • History
    • English Civil War
    • 18th Century
    • 19th Century
    • 20th Century
    • WW I
    • WW II
    • The Cold War
  • Literature
    • Biography
    • Book Reviews
    • Fiction
    • Mystery
    • Poetry
    • Satire
    • Thriller
  • Forums
    • Campaigning
    • Competitions
    • Culture
    • Current Affairs
    • Elections
    • GP Events
    • Media Shows & Appearances
    • Publishing
    • Welcome
  • Merchandise
    • Trump Mugs and Tee Shirts
    • Custom Mug
    • GP Mugs
    • GP Coasters
    • GP Books
    • GP Keyrings

Allan Cunningham

OldTrout, Going Postal
18th Century

Sophie Germain Primes and Cunningham Chains

28th September 2020 OldTrout 2232 Comments

A Sophie Germain prime is a prime number such that is also a prime number. That is, ,  where and are both prime.  For example, . The sequence begins Sophie Germain () explored these primes [more…]

Latest Articles

  • The Protectionists Have No Theory
    5th June 2025 850 Comments
  • The Wehrpass of Ferdinand Friedrich Karl Ruhmann
    4th June 2025 2132 Comments
  • Book Review: An Immigrant’s Love Letter to the West, by Konstantin Kisin
    4th June 2025 2597 Comments
  • West Country Rides, Two
    3rd June 2025 2076 Comments
  • Home Backup Systems, Part Three
    3rd June 2025 2622 Comments
  • What does Reform UK stand for
    2nd June 2025 4625 Comments
  • An Old Man’s Musings Part Thirty
    1st June 2025 2057 Comments

GP on Twitter

Tweets by GoingPostalBlog

Elsewhere on GP

  • Going Postal Saturday Puzzles Number 208

    19th February 2022 1994 Comments
    SOD-YOU-KO 208 Word Search 208 First correct entry out of ‘the hat’ wins one of these. Email entries to me by 6.00 pm Friday, subject ‘Crossword’. Contact here on email Winner of Crossword 207 and [more...]
  • Independent or Hamas?

    10th May 2025 1484 Comments
    The days when independent councillors were well-meaning, often single-cause, advocates saving a hospital or moving a gypsy camp, are long gone. Although Reform UK caught the headlines in early May’s local elections, their success was [more...]
  • David Sedgwick, Going Postal

    Book Review: The Fake News Factory by David Sedgwick

    8th May 2020 2445 Comments
    I read David Sedgwick’s first book about the BBC, ‘BBC: Brainwashing Britain?’ (the Kindle version) when it came out in December 2018 and was immediately nodding and mouthing ‘yes, yes, yes’ at virtually every page. [more...]
  • Let’s Fight Alongside President Donald Trump! MAGA!

    6th March 2021 2264 Comments
    I have been suffering from TWS for almost two months. ( Trump Withdrawal Syndrome ). Listening to his phenomenal speech closing out the 2021 CPAC in Orlando, Florida, recharged my batteries, refilled my glass of [more...]
  • Porcelain

    5th September 2017 0 Comments
    Porcelain, in many ways, is an ideal material for making sculpture, strong, light and is both amenable to colour and beautiful just as it is. It will not, however, resist thermal or mechanical shock. Treated [more...]

Articles by Author

  • 70s_girl
  • 1642again
  • 10210ken
  • Æthelberht
  • Alexsandr too
  • Always Worth Saying
  • Ancient Mariner
  • Ang Ryman
  • Annie Dee
  • AW Kamau
  • Bark Kantatas
  • Barbican
  • Bassman
  • Bergen
  • Beware of Geeks bearing GIFs
  • Bill Quango MP
  • Blown Periphery
  • Bobo
  • Chrissie
  • Churchills Shark
  • Colin Cross
  • Colliemum
  • Columba Palumbus
  • Cynic
  • Dalester
  • DH
  • Dixie
  • DJM
  • Dorset Knob
  • Doxie
  • Dr Mike Finnley
  • EJ – Wankpuffin
  • El Cnutador
  • Emile Woolf
  • Eraser of Love
  • Foxoles
  • Gillygangle
  • Gmbd
  • Godfrey Bloom
  • Grimy Miner
  • GrumpyAngler
  • Guardian Council
  • Ivory Cutlery
  • James Dalton
  • Jethro
  • Jerry F
  • Jerry Mandarin
  • JimmySP
  • Jim Walshe
  • Joe Slater
  • Joe Williams
  • John Booth
  • John Tull
  • Jonathon Davies
  • Judas was paid
  • Katabasis
  • Kent
  • Kipper
  • LetEnglandShake
  • Lugosi
  • Madam Revenant
  • Martin Mezger
  • Mr QM
  • Nautilus
  • NeverUpToTheJob
  • Noix
  • Northern man
  • Oddanatomy
  • OldTrout
  • Ozymandias
  • Paul Wicker
  • Phil the test manager
  • Rat Catcher
  • RedBudgie
  • Reggie
  • Roger Ackroyd
  • Rookwood
  • Ross
  • SharpieType301
  • Shibusa
  • Sunshine & Showers
  • Sweaty Dave
  • Tachybaptus
  • The Black Swan
  • The Buttscratcher Jimmy
  • Tom Pudding
  • Verax Cincinnatus
  • Viciousbutfair
  • Vir Cantium
  • \/()43 |_|K19
  • well_chuffed
  • William
  • WorthingGooner
  • Wycombewanderer

Archives

Contribute to GP

If you wish to make a contribution small and often would be preferable. Paypal accepts all sorts of payment methods.




In Pictures

Meta
  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org
Sitemap
  • Home
  • Bash 2025
  • About
  • Contact
  • Support and Subscriptions
  • Moderation philosophy and policy
  • Privacy Policy
  • Disqus Help Page

Copyright © 2025 | MH Magazine WordPress Theme by MH Themes