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collatz

Functions Related to the Collatz/Syracuse/3n+1 Problem

v1.0.0 · Sep 5, 2022 · Apache License (== 2.0)
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Description

Provides the basic functionality to interact with the Collatz conjecture. The parameterisation uses the same (P,a,b) notation as Conway's generalisations. Besides the function and reverse function, there is also functionality to retrieve the hailstone sequence, the "stopping time"/"total stopping time", or tree-graph. The only restriction placed on parameters is that both P and a can't be 0. For further reading, see <https://en.wikipedia.org/wiki/Collatz_conjecture>.

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2 NOTE
12 OK
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r-devel-linux-x86_64-debian-clang NOTE
r-devel-linux-x86_64-debian-gcc NOTE
r-devel-linux-x86_64-fedora-clang OK
r-devel-linux-x86_64-fedora-gcc OK
r-devel-macos-arm64 OK
r-devel-windows-x86_64 OK
r-oldrel-macos-arm64 OK
r-oldrel-macos-x86_64 OK
r-oldrel-windows-x86_64 OK
r-patched-linux-x86_64 OK
r-release-linux-x86_64 OK
r-release-macos-arm64 OK
r-release-macos-x86_64 OK
r-release-windows-x86_64 OK
Check details (14 non-OK)
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.
NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.
OK r-devel-linux-x86_64-fedora-clang

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Check History

        

          

            
              NOTE
              
                12 OK ·                 2 NOTE ·                 0 WARNING ·                 0 ERROR ·                 0 FAILURE              
              Mar 9, 2026
            
            

              

                

                  NOTE
                  r-devel-linux-x86_64-debian-clang
                

                
CRAN incoming feasibility

                
Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

              

              

                

                  NOTE
                  r-devel-linux-x86_64-debian-gcc
                

                
CRAN incoming feasibility

                
Maintainer: ‘Nathan Levett <nathan.a.z.levett@gmail.com>’

The BugReports field in DESCRIPTION has
  https://github.com/Skenvy/Collatz/issues/new/choose
which should likely be
  https://github.com/Skenvy/Collatz/issues/new/choose/issues
instead.

              

            

          

        

      


      

      
      

        
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              gmp
            

            

            
            
            collatz
          
        

      


      
      

        
Version History

        

          

            new
            1.0.0
            Mar 9, 2026